How many senses does a human body have?


How many senses does a human body have?

Most children are taught that the human body has five senses: sight, hearing, touch, taste, and smell. But many neurologists identify nine or more senses, and some list as many as 21.

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What are the elements that make up living things?


What are the elements that make up living things?

The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Atoms of these elements combine and form thousands of large molecules. These large molecules make up the structures of cells and carry out many processes essential to life.

When is the next time the planets will align?


When is the next time the planets will align?

One calculation of alignments within around thirty degrees (about as close as they can get) shows that the last such alignment was in 561 BC, and the next will be in 2854. All nine planets are somewhat aligned every 500 years, and are grouped within 30 degrees every 1 to 3 alignments.

Are clouds made up of liquid or gas?


Are clouds made up of liquid or gas?

Clouds, snow, and rain are all made of up of some form of water. A cloud is comprised of tiny water droplets and/or ice crystals, a snowflake is an aggregate of many ice crystals, and rain is just liquid water. Water existing as a gas is called water Vapour.

Which planet is known as bright wandering star?


Which planet is known as bright wandering star?

It is the fifth planet from the Sun, and it is more than twice as massive as all the other planets combined. Jupiter is the fourth brightest object in the sky (after the Sun, the Moon and Venus). It has been known since prehistoric times as a bright “wandering star”

How much does the temperature change with altitude?


Although the actual atmospheric lapse rate varies, under normal atmospheric conditions the average atmospheric lapse rate results in a temperature decrease of 6.4C°/km (3.5F°/1,000 ft) of altitude above ground level. The measurable lapse rate is affected by the moisture content of the air (humidity).

What is the river that separates China and North Korea?


What is the river that separates China and North Korea?

From west to east, the Yalu River, Paektu Mountain, and the Tumen River divide the two countries. Dandong, in the Liaoning Province of China, is the largest city on the border. On the other side of the river is the city of Sinuiju in North Pyongan Province, North Korea.

What countries are included in UK?


The official name of the UK is the “United Kingdom of Great Britain and Northern Ireland”. The name refers to the union of what were once four separate nations: England, Scotland, Wales and Ireland (though most of Ireland is now independent). The United Kingdom is made up of: England – The capital is London.

Is White Light the absence of color?


In the visible spectrum, white reflects light and is a presence of all colors, but black absorbs light and is an absence of color. Black can be defined as the visual impression experienced when no visible light reaches the eye.

How long do dogs live on average?


Nearly 40% of small breed dogs live longer than 10 years, but only 13% of giant breed dogs live that long. The average 50-pound dog will live 10 to 12 years. But giant breeds such as great Danes or deerhounds are elderly at 6 to 8 years.

What country has the highest number of spoken languages in the world?


Papua New Guinea has the highest number of spoken languages in the world. There are 820 indigenous languages spoken in this country. The official language is Tok Pisin, or New Guinea Pidgin, and is the most widely spoken language after English, a legacy of the colonial period.

How does a giraffe sleep?


In the wild, giraffes almost never lie down because of vulnerability to predators. They usually sleep standing, sometimes sitting, and they give birth standing up. When giraffes sleep, they curl their necks and sleep for about five minutes at a time, sleeping no more than 30 minutes a day.

Who invented the first alphabet?


The original alphabet was developed by a Semitic people living in or near Egypt.* They based it on the idea developed by the Egyptians, but used their own specific symbols. It was quickly adopted by their neighbors and relatives to the east and north, the Canaanites, the Hebrews, and the Phoenicians.

How much water is inside the human body?


By one year of age, that amount drops to about 65%. In adult men, about 60% of their bodies are water. However, fat tissue does not have as much water as lean tissue. In adult women, fat makes up more of the body than men, so they have about 55% of their bodies made of water.

What causes muscles to be sore after workout?


Lactic acid is a normal byproduct of muscle metabolism, but it can irritate muscles and cause discomfort and soreness. Muscle soreness associated with exercise is known as delayed onset muscle soreness or DOMS.

Which country has the most islands in the world?


The five main archipelagos are Indonesia, Japan, the Philippines, New Zealand, and the British Isles. The largest archipelagic state in the world, by area and population, is Indonesia. The archipelago with the most islands is the Archipelago Sea in Finland.

Where did hieroglyphics develop?


Where did hieroglyphics develop?

The hieroglyphic system used in ancient Egypt had between 700 and 800 basic symbols, called glyphs. This number grew in the last centuries of ancient Egyptian civilization, because of an increased interest in writing religious texts.

Do bears sleep all winter long?


It is a common misconception that bears hibernate during the winter. While bears tend to slow down during the winter, they are not true hibernators. Black bears, Grizzly bears and Brown bears do go into a deep sleep during the winter months, known as torpor. Hibernation is when animals “sleep” through the winter.

How do snakes hear if they dont have ears?


When people and most animals hear, sound waves strike the eardrum and go to the inner ear, which is sensitive to the sound waves or vibrations. Snakes do not have eardrums, but their skins, muscles, and bones carry the sound waves to the inner ears.

Is smoke a state of matter?


Smoke is particulate material suspended in a gas (air). The particulates may be very finely divided solids or aerosol particles composed of liquid materials. Smoke is neither solid or gas, it is a colloidal dispersion that is a different arrangement of matter.

How strong is a strand of human hair?


A single strand could hold 100g (3oz) in weight: the combined hair of a whole head could support 12 tonnes, or the weight of two elephants. Weight for weight, it is not as strong as steel: more like aluminium, or reinforced glass fibres or Kevlar, which is used to make bulletproof vests.

Why does fruit ripen faster in a paper bag?


Placing fruit in a paper bag helps to concentrate the levels of ethylene gas which is what helps induce the ripening of the above mentioned fruits (bananas/avocados, etc.). In fact, avocados and pears must be picked in order to ripen.

Why does fruit ripen faster in a paper bag?


Placing fruit in a paper bag helps to concentrate the levels of ethylene gas which is what helps induce the ripening of the above mentioned fruits (bananas/avocados, etc.). In fact, avocados and pears must be picked in order to ripen.

Which country first adopted time zones?


On November 2, 1868, the then-British colony of New Zealand officially adopted a standard time to be observed throughout the colony, and was perhaps the first country to do so. It was based on the longitude 172°30′ East of Greenwich, that is 11 hours 30 minutes ahead of GMT.

What makes a primary color?


Start with red, yellow, and blue paint—the primary colors. Use these to make secondary colors. Then make tertiary colors by mixing primary colors with the nearest secondary colors. (For example, you might mix yellow with green to make yellow-green, or yellow with orange to make yellow-orange.

Why are icebergs made of fresh water?


True icebergs are galcier fragments that have fallen into the sea. Glaciers are made of compacted smow, which is fresh water. Additionally, “sea ice” that forms from the freezing of sea water is also basically fresh water as well. This is because when saltwater freezes, it excludes salt from the ice crystal lattice.

Which is the hardest bone in the human body?


The head of the femur articulates with the acetabulum in the pelvic bone forming the hip joint, while the distal part of the femur articulates with the tibia and patella forming the knee joint. By most measures the femur is the strongest bone in the body. The femur is also the longest bone in the body.

Where did algebra get its name from?


The word algebra is a Latin variant of the Arabic word al-jabr . This came from the title of a book, Hidab al-jabr wal-muqubala , written in Baghdad about 825 A.D. by the Arab mathematician Mohammed ibn-Musa al-Khowarizmi.

Do ants have blood in their body?


Ants do not have lungs. Oxygen enters through tiny holes all over the body and Carbon Dioxide leaves through the same holes. There are no blood vessels. The heart is a long tube that pumps colorless blood from the head back to the rear and then back up to the head again.

What is the hormone that wakes you up?


To prepare for the stress of waking, your body releases a cocktail of stress hormones, like cortisol. Gradually, your sleep becomes lighter and lighter. And that’s why you wake up before your alarm. Your body hates your alarm clock.

What were the first forms of life on Earth?


For the next 1.3 billion years (3.8 to 2.5 billion years ago), the Archean Period, first life began to appear and the world’s landmasses began to form. Earth’s initial life forms were bacteria, which could survive in the highly toxic atmosphere that existed during this time.

What do introverts mostly do?


Pradhyumna Singh, “space-time traveller”

Updated Mon

It takes them around 30 minutes atleast to sleep after getting in bed cause they have one hell of a cyclone of thoughts in their minds, it takes time to settle down.

Prefer traveling alone, unless the co-traveller is one of his inner circle friends.

Stare at things for a while where a normal person won’t pay attention.

Most of the time deliberately ignore calls but call back again 10–15 minutes later with an excuse.

Can identify their crush even by shadow of her, or a little glimpse in a crowd and even from very large distance from where you can just see outline of a person.

Perfect species when it comes to waiting, don’t yell generally.

Prefer Quora over Facebook.

Most of the groups in their whatsapp are mute.

Avoid negativity very well.

Never indulge themselves in trivial materialistic things, but also enjoy this if it comes from their special someone. Ex. Shopping with girlfriend/wife.

Generally room of a person is outer manifestation of their thoughts, for introverts it is full of chaos so have messy rooms.

Go by need basis, if it feels like bathing, they will take bath, timing doesn’t matter.

They don’t buy bullshit, either will remain silent or will shoot straight.

Clearly understand difference between lust and love.

They debate rarely but when they do, people generally ask them, Hey bro what happened to you?

They don’t write answers in Quora unless they feel like answering. Again, Go by need basis ( point 12).

What breeds of dogs can see in color?


What breeds of dogs can see in color?

Neitz confirmed that dogs actually do see color, but many fewer colors than normal humans do. Instead of seeing the rainbow as violet, blue, blue-green, green, yellow, orange and red, dogs would see it as dark blue, light blue, gray, light yellow, darker yellow (sort of brown), and very dark gray.

What is an upside down rainbow called?


What is an upside down rainbow called?

An upside-down rainbow is an unusual phenomenon caused by sunlight shining through a thin, visible screen of tiny ice crystals high in the sky. Interestingly enough, it has nothing to do with rain. Some people refer to this as a ‘smile rainbow’.

What organ produces adrenaline?


Epinephrine and norepinephrine are two separate but related hormones secreted by the medulla of the adrenal glands. They are also produced at the ends of sympathetic nerve fibres, where they serve as chemical mediators for conveying the nerve impulses to effector organs.

How high is the top of the atmosphere?


Earth’s atmosphere is about 300 miles (480 kilometers) thick, but most of it is within 10 miles (16 km) the surface. Air pressure decreases with altitude. At sea level, air pressure is about 14.7 pounds per square inch (1 kilogram per square centimeter).

Why is it called the Continental Divide?


The Continental Divide, also called the Great Divide, is a natural boundary line separating waters that flow into the Atlantic Ocean or Gulf of Mexico from those that flow into the Pacific Ocean. It runs north-south from Alaska to northwestern South America.

Do fish sleep at night?


Yes, I would say that fish do sleep. Some fish actually lie on the bottom at night. Some of them even produce a gooey covering as a protection against other fish who might be looking for an easy meal. In the dark many fish have a lower rate of metabolism (their body machinery slows down), and that is much like sleep.

How many active volcanoes are there in the world?


How many active volcanoes are there in the world?

There are about 1500 potentially active volcanoes worldwide, aside from the continuous belt of volcanoes on the ocean floor. About 500 of these have erupted in historical time. Many of these are located along the Pacific Rim in what is known as the ‘Ring of Fire.’

How long is a day on the equator?


On the Equator, the duration of daylight is not exactly 12 hours all the year round, but rather — because of atmospheric refraction and the size of the Sun — exceeds 12 hours by about 7 minutes each day;

Is a mushroom a vegetable?


A mushroom is neither a fruit nor a vegetable; technically mushrooms aren’t even plants. They are a special type of fungus—a notion that puts some people off. If you don’t mind the fungus part, though, mushrooms are a great addition to a healthy diet—not to mention totally delicious.

What part of the body never stops growing?


Bones, stop growing after puberty and muscle and fat cells also stop dividing. But cartilage – that’s the plastic-like stuff in ears and noses – cartilage continues to grow until the day you die. Not only does cartilage grow, but the earlobes elongate from gravity.

Why are your lips red?


Your lips’ red or pink pigment comes from underlying blood vessels — red-colored, blood-filled capillaries are close to the thin skin on your lips. The transition of the reddish-pink outline of your lips to the rest of the skin is called the vermillion border, and it’s found only in humans.

What percentage of your weight is muscle?What percentage of your weight is muscle?


Exercise is very important in maintaining a healthy body and the muscle mass % is a useful indicator to control it. The normal muscle mass percentage on the body weight lies between 38% and 54% for men and between 28% and 39% for women depending on age and physical activity level.

Why do cats eyes glow at night?


Cats, dogs, and many nocturnal creatures appear to have glowing eyes because the back of their eyeballs include a special reflective layer called the tapetum lucidum. This helps animals (cats in this case) see better in low light by working like a mirror on the retina to reflect the light back through the eyes,

How long does it take to recover from giving blood?


Your body will replace the blood volume (plasma) within 48 hours. It will take four to eight weeks for your body to completely replace the red blood cells you donated. The average adult has eight to 12 pints of blood. You will not notice any physical changes related to the pint you donated.

How many teeth does an elephant have?


Elephants usually have 26 teeth: the incisors, known as the tusks, 12 deciduous premolars, and 12 molars. Unlike most mammals, which grow baby teeth and then replace them with a single permanent set of adult teeth, elephants are polyphyodonts that have cycles of tooth rotation throughout their lives.

What country does the Sahara Desert cover?


Oases support some life forms in extremely arid deserts. The Sahara covers large parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan and Tunisia, extends over 9,000,000 km² (over 3,475,000 sq mi) and it covers about 1/4 of the African continent.

Can you kill bacteria by freezing?


Freezing foods renders bacteria inactive but doesn’t actually kill anything. That means if your food went into the freezer contaminated, once thawed it will still harbor the same harmful bacteria. Cooking it to the recommended temperature is the only way to ensure that your food is safe.

Can graphite conduct electricity?


Graphite is an electric conductor, consequently, useful in such applications as arc lamp electrodes. It can conduct electricity due to the vast electron delocalization within the carbon layers (a phenomenon called aromaticity). These valence electrons are free to move, so are able to conduct electricity.

What is your tongue attached to?


The hyoid is anchored by muscles from the anterior, posterior and inferior directions, and aids in tongue movement and swallowing. The hyoid bone provides attachment to the muscles of the floor of the mouth and the tongue above, the larynx below, and the epiglottis and pharynx behind.

When was the first search engine invented?


The first few hundred web sites began in 1993 and most of them were at colleges, but long before most of them existed came Archie. The first search engine created was Archie, created in 1990 by Alan Emtage, a student at McGill University in Montreal.

What percentage of our brain do we use?


What percentage of our brain do we use?

The popularly and widely spread belief that we only use or have access to 10 percent of our brain’s power is often used to speculate about the extent of human abilities if only we could utilize our brain’s full capacity. In reality, this claim is 100 percent myth. We use all of our brain.

Which is the master gland in human body?


Which is the master gland in human body?

The thyroid gland, ovaries, testes, mammary glands, and the cortex of the adrenal glands are all stimulated by the hormones of the anterior pituitary, resulting in the pituitary gland being known as the “master gland” for its control of the endocrine system.

Do tomatoes 🍅 have nicotine in them?


While most people know that nicotine can be found in tobacco, low levels of the compound can be found in peppers, tomatoes and other members of the Solanaceae flowering plant family. Researchers wanted to determine if even small amounts of edible nicotine would be able to lower the risk of Parkinson Diseases.

Are teeth part of the skeletal system?


Your teeth are also considered part of your skeletal system but they are not counted as bones. Your teeth are made of enamel and dentin. Enamel is the strongest substance in your body.

What are bones made up of?


What are bones made up of?

Bone is made mostly of collagen, a protein that is woven into a flexible framework. Bone also contains calcium phosphate and calcium carbonate, minerals that add strength and harden the framework. The combination of calcium and collagen gives the bone its strength and flexibility.

Why does the moon control the tides?


The tides are due to the gravitational pull of the Moon and the Sun on the Earth. Because the gravitational force decreases as the distance squared, the part of the Earth that is closer to the Moon or the Sun is pulled a little extra and a bulge is created.

How often do we get a full moon?


How often do we get a full moon?

The modern day definition of a Blue Moon is when there are 2 full moons in one Month. A full moon occurs roughly every 29.5 days and on the rare occasions when the full moon falls at the very beginning of a month there is a good chance a Blue Moon will occur at the end of the month.

What does the Mohs scale measure?


A scale used to measure the relative hardness of a mineral by its resistance to scratching. From softest to hardest, the ten minerals of the Mohs scale are talc (measuring 1 on the scale), gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum, and diamond (measuring 10 on the scale).

What color is between red and blue?


In between these colours may be seen secondary colours that are, perceptually, each a mixture of two of the primaries. Thus, you will see yellow between red and green, and cyan blue between green and blue-violet. The third secondary colour of light is magenta.

Why does water bubble when it boils?


The solubility of gases decreases when the temperature is raised, and that why the dissolved air bubbles out from the water. Then, as the boiling point of water is reached (100 degrees Celsius or 212 degrees Fahrenheit), water vapor starts to form inside the liquid in the form of bubbles.

What magnification do you need to see bacteria?


At 400x magnification you will be able to see bacteria, blood cells and protozoans swimming around. At 1000x magnification you will be able to see these same items, but you will be able to see them even closer up.

How much does the temperature change with altitude?


Although the actual atmospheric lapse rate varies, under normal atmospheric conditions the average atmospheric lapse rate results in a temperature decrease of 6.4C°/km (3.5F°/1,000 ft) of altitude above ground level. The measurable lapse rate is affected by the moisture content of the air (humidity).

What time period are we in?


In geochronology, an epoch is a subdivision of the geologic timescale that is longer than an age and shorter than a period. We are currently living in the Holocene Epoch of the Quaternary Period. Rock layers deposited during an epoch are called a series.

Which is the largest carnivorous land animal?


Today’s large carnivorous land mammals, including the record-setting polar bears—which usually weigh around half a ton but can grow to weigh nearly a ton, are threatened in part because of the energy intake-and-expenditure equation, Carbone told LiveScience

Who first proposed the theory of evolution by natural selection?


In the early 19th century, Jean-Baptiste Lamarck proposed his theory of the transmutation of species, the first fully formed theory of evolution. In 1858, Charles Darwin and Alfred Russel Wallace published a new evolutionary theory that was explained in detail in Darwin’s On the Origin of Species (1859).

Do frogs have ears?


Frogs can hear both in the air and below water. They do not have external ears; the eardrums (tympanic membranes) are directly exposed or may be covered by a layer of skin and are visible as a circular area just behind the eye.

Who was the designer of the Olympic rings?


The primary symbol of the Olympic Games is composed of five interlocking rings, colored blue, yellow, black, green, and red on a white field, known as the “Olympic rings.” The symbol was originally designed in 1912 by Baron Pierre de Coubertin, co-founder of the modern Olympic Games.

Are genes located on chromosomes?


In genetics, a locus (plural loci) is the specific location of a gene, DNA sequence, or position on a chromosome. Each chromosome carries many genes; humans’ estimated ‘haploid’ protein coding genes are 20,000-25,000, on the 23 different chromosomes.

How many moons does Mars have?


Mars has two moons, Phobos and Deimos, which are thought to be captured asteroids. Both satellites were discovered in 1877 by Asaph Hall and are named after the characters Phobos (panic/fear) and Deimos (terror/dread) who, in Greek mythology, accompanied their father Ares, god of war, into battle.

Which planet has the hottest surface temperature?


Venus, the second closest plant to the Sun, has the highest average temperatures of any planet in our Solar System, regularly reaching temperatures over 460°C. Venus is so hot because of its proximity to the Sun and its thick atmosphere.

Which planet has the hottest surface temperature?


Venus, the second closest plant to the Sun, has the highest average temperatures of any planet in our Solar System, regularly reaching temperatures over 460°C. Venus is so hot because of its proximity to the Sun and its thick atmosphere.

What countries border the Black Sea?


The Black Sea is an inland sea located between far-southeastern Europe and the far-western edges of the continent of Asia and the country of Turkey. It’s bordered by Turkey, and by the countries of Bulgaria, Romania, Ukraine, Russia and Georgia.

Can babies breathe through their mouths?


Newborns are “obligate nose breathers.” This means they can’t breathe through their mouths in the first few months of life. Because babies have small nasal passages, they sound stuffy when they breathe.

Can you go blind from looking at a solar eclipse?


While it may be tempting to brush off warnings against looking up at this eclipse bare-eyed, don’t: The light of an eclipse really can damage your eyes — though warnings of total blindness are likely overstated. The condition is called solar retinopathy, and it occurs when bright light from the sun floods the retina.

Is blue eyes a mutation?


New research shows that people with blue eyes have a single, common ancestor. A team at the University of Copenhagen have tracked down a genetic mutation which took place 6-10,000 years ago and is the cause of the eye colour of all blue-eyed humans alive on the planet today.

Do starfish have a brain?


The nervous system of the starfish is very simple…there is no brain and there are not even any ganglia to coordinate movement. The nervous system is characterized by a nerve ring that surrounds the mouth. A radial nerve branches off of the nerve ring and extends to each arm.

Who flew the first plane in the world?


Orville and Wilbur Wright designed and flew their Flyer plane in December 1903. Five people were said to have witnessed the flight including John T. Daniels who took photographic evidence. Claims that Whitehead beat the Wright Brothers to the record first emerged in 1937.

Do sea otters have pockets?


Under each foreleg, the sea otter has a loose pouch of skin that extends across the chest. In this pouch (preferentially the left one), the animal stores collected food to bring to the surface. This pouch also holds a rock, unique to the otter, that is used to break open shellfish and clams.

How many bones does a horse have?


Generally, the horse has 205 bones (54 vertebral column, 36 ribs, 1 sternum, 34 skull, 40 front legs, 40 hindlegs). The number of tail coccygeal vertebrae is usually 18 but can also vary.

What causes dimples in the cheeks?


Dimples are caused by an abnormally short facial muscle. The zygomaticus major, a facial muscle, is attached to the skin of your cheeks. Dimples appear when the muscle pulls hard enough on your cheeks to cause visible indentations on your face. This usually occurs when we speak or smile, when the muscle is contracting.

Who discovered the vaccine for polio?


Jonas Salk. Jonas Edward Salk (October 28, 1914 – June 23, 1995) was an American medical researcher and virologist. He discovered and developed the first successful inactivated polio vaccine. He was born in New York City to Jewish parents.

Do male seahorses get pregnant?


In sea horses, the males become pregnant. Their mating involves the female inserting her oviduct into the male’s brooding pouch. She does this several times for short intervals to avoid exhaustion. In between the female rests while the male contorts himself to try to get the eggs in place in his brood pouch.

Why does your body get the chills/Shiver?


Why does your body get the chills?

Chills (shivering) may occur at the beginning of an infection and are usually associated with a fever. Chills are caused by rapid muscle contraction and relaxation. They are the body’s way of producing heat when it feels cold. Chills often predict the coming of a fever or an increase in the body’s core temperature.

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Why do they add iodine to salt?


Why do they add iodine to salt?

Iodised salt (also spelled iodized salt) is table salt mixed with a minute amount of various salts of the element iodine. The ingestion of iodide prevents iodine deficiency. Worldwide, iodine deficiency affects about two billion people and is the leading preventable cause of intellectual and developmental disabilities.

What diseases can you get from lack of vitamin C?


Scurvy is a disease caused by a diet that lacks vitamin C (ascorbic acid). Patients develop anemia, debility, exhaustion, edema (swelling) in some parts of the body, and sometimes ulceration of the gums and loss of teeth. The name scurvy comes from the Latin scorbutus

What continent has the most deserts?


Antarctica, on average, is the coldest, driest, and windiest continent, and has the highest average elevation of all the continents. Antarctica is considered a desert, with annual precipitation of only 200 mm (8 inches) along the coast and far less inland.

What percent of the population is ambidextrous?


About 90 percent of people are right-handed, says Corballis. The remaining 10 percent are either left-handed or some degree of ambidextrous, though people with “true” ambidexterity—i.e., no dominant hand at all—only make up about 1 percent of the population.

What is the dew point?


Dew point temperature is defined as the temperature to which the air would have to cool (at constant pressure and constant water vapor content) in order to reach saturation. A state of saturation exists when the air is holding the maximum amount of water vapor possible at the existing temperature and pressure.

How many different kinds of animals are there in the world?


According to World Book Encyclopedia, “So far scientists have named and classified more than 1 1/2 million animals. Over half of these are types of insects and other species are discovered each year. Scientists believe there may be from 2 million to as many as 50 million kinds of animals alive today.”

Why are there 60 seconds in a minute?


THE DIVISION of the hour into 60 minutes and of the minute into 60 seconds comes from the Babylonians who used a sexagesimal (counting in 60s) system for mathematics and astronomy. They derived their number system from the Sumerians who were using it as early as 3500 BC.

How are diamonds formed?


Most natural diamonds are formed at high temperature and pressure at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth’s mantle. Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years (25% to 75% of the age of the Earth).

How many weeks is a normal human pregnancy?


Childbirth usually occurs about 38 weeks after conception; in women who have a menstrual cycle length of four weeks, this is approximately 40 weeks from the start of the last normal menstrual period (LNMP). Human pregnancy is the most studied of all mammalian pregnancies.

What oath does a doctor take?


Hippocratic Oath: Modern Version. I swear to fulfill, to the best of my ability and judgment, this covenant: I will respect the hard-won scientific gains of those physicians in whose steps I walk, and gladly share such knowledge as is mine with those who are to follow.

Which gas is known as laughing gas?


Laughing gas is nitrous oxide, N2O (more properly called dinitrogen oxide). It is a colorless gas with a sweet odor and taste. Inhalation leads to disorientation, euphoria, numbness, loss of motor coordination, dizziness, and ultimately a loss of consciousness.

What animals eat spiders?


Because they are small, spiders have many enemies. Larger animals, such as birds, toads, lizards and monkeys, hunt them. But they are also used as food by many smaller creatures. Ticks will attach themselves to a spider and eat away at it for a long time while the spider goes about its business.

What kind of animals live in the desert?


There are coyotes, foxes, peccaries, tarantulas, scorpions, ring tailed cats, antelope, skunks, mule deer, boars, and in some places, lions and elephants. There is an abundance of small animals that support the deserts population of hawks, falcons, owls, roadrunners, buzzards, and eagles.

How high are the clouds?


Low-level clouds lie below 6,500 feet (2,000 meters). Meteorologists refer to them as stratus clouds. They’re often dense, dark, and rainy (or snowy) though they can also be cottony white clumps interspersed with blue sky. The most dramatic types of clouds are cumulus and cumulonimbus, or thunderheads.

Which sea on the Earth has no beaches?


The Sargasso Sea, The Sea Without A Shore. The Sargasso Sea is located in the middle of the Atlantic Ocean, just a little north of the equator. The water in the Sargasso Sea is one of the clearest in the ocean, with underwater visibility of up to and incredible 200 feet.

Why does the moon control the tides?


The tides are due to the gravitational pull of the Moon and the Sun on the Earth. Because the gravitational force decreases as the distance squared, the part of the Earth that is closer to the Moon or the Sun is pulled a little extra and a bulge is created.

What is the use of the sphygmomanometer?


What is the use of the sphygmomanometer?

A sphygmomanometer is the gauge used to measure blood pressure. The sphygmomanometer reads both systolic and diastolic pressure. A doctor takes these measurements by putting on the cuff and pumping it up, which cuts off the blood flow.

Is the tongue a muscle or an organ?


Is the tongue a muscle or an organ?

The tongue is a muscular organ in the mouth. The tongue is covered with moist, pink tissue called mucosa. Tiny bumps called papillae give the tongue its rough texture. Thousands of taste buds cover the surfaces of the papillae.

Which is the strongest muscle in the human body?


Which is the strongest muscle in the human body?

If by strongest you mean “ability to exert a force on an external object”, then a human’s strongest muscle is his or her ‘masseter’ muscle. The masseter muscle is a thick muscle in the cheek and is located at the back of the jaw.

Is dry ice poisonous to drink with?


Is dry ice poisonous to drink with?

No it will not poison you to drink a liquid that is directly cooled by dry ice. At normal pressures there may be some gaseous CO2 dissolved in the liquid giving it a mild carbonation. However, dry ice can be dangerous to bare skin, mouth, or GI tissue if someone swallows a medium to large pieces of dry ice.

What organs can regenerate themselves?


The liver is the only human internal organ capable of natural regeneration of lost tissue; as little as 25% of a liver can regenerate into a whole liver. Regeneration is very rapid. The liver will return to a normal size in one to two weeks following the removal of greater than 50% of the liver by mass.

Can you have a fire without oxygen?


A fire cannot burn without oxygen. You can show this for yourself, in fact: if you light a small candle and then put a clear glass upside-down over that candle (without touching the flame), you can watch the flame slowly extinguish as it uses up all of the oxygen that you have trapped around it with the glass.

How long does it take for nails to grow?


How long does it take for nails to grow?

In humans, the nail of the index finger grows faster than that of the little finger; and fingernails grow up to four times faster than toenails. In humans, nails grow at an average rate of 3 mm (0.12 in) a month. Fingernails require three to six months to regrow completely, and toenails require 12 to 18 months.

What part of the plant is a carrot?


What part of the plant is a carrot?

When we eat corn or peas we are eating seeds, and when we eat radish or carrot, we are eating roots. Cauliflower and broccoli plants produce flowers we like to eat. Potatoes grow under- ground, but the part we eat is not a root.