How many species of octopus are there in the world?
The octopus is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. The term may also refer to only those creatures in the genus Octopus. In the larger sense, there are 289 different octopus species, which is over one-third the total number of cephalopod species.
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The octopus is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. The term may also refer to only those creatures in the genus Octopus. In the larger sense, there are 289 different octopus species, which is over one-third the total number of cephalopod species.
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Do whales drink salt water?
DOLPHINS and other sea-dwelling mammals can obtain water from their food and by producing it internally from the metabolic breakdown of food. Although some marine mammals are known to drink seawater at least on occasion, it is not well established that they routinely do so.
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DOLPHINS and other sea-dwelling mammals can obtain water from their food and by producing it internally from the metabolic breakdown of food. Although some marine mammals are known to drink seawater at least on occasion, it is not well established that they routinely do so.
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Why is the left lung smaller than the right lung?
The left lung is slightly smaller than the right lung because 2/3 of the heart is located on the left side of the body. The left lung contains the cardiac notch, an indentation in the lung that surrounds the apex of the heart. Each lung consists of several distinct lobes.
@askmenow
The left lung is slightly smaller than the right lung because 2/3 of the heart is located on the left side of the body. The left lung contains the cardiac notch, an indentation in the lung that surrounds the apex of the heart. Each lung consists of several distinct lobes.
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Do carrots help your eyesight?
A diet of carrots won't give a blind person 20/20 vision. But the vitamins found in the vegetable can help promote overall eye health. Carrots contain beta-carotene, a substance that the body converts to vitamin A, an important nutrient for eye health.
@askmenow
A diet of carrots won't give a blind person 20/20 vision. But the vitamins found in the vegetable can help promote overall eye health. Carrots contain beta-carotene, a substance that the body converts to vitamin A, an important nutrient for eye health.
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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.
@askmenow
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.
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Do all bears hibernate in the winter?
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.
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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.
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How much of an iceberg is below the surface?
Over 90% of an iceberg's volume (and mass) is underwater. As you can see, the convenient definition of the gram gives us a quick way to see how much of a floating substance lies below the surface of fresh water: the fraction is equal to that substance's mass density in g/cm³.
@askmenow
Over 90% of an iceberg's volume (and mass) is underwater. As you can see, the convenient definition of the gram gives us a quick way to see how much of a floating substance lies below the surface of fresh water: the fraction is equal to that substance's mass density in g/cm³.
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Who invented the seat belt?
Volvo built their reputation on selling safer cars, but they gave away the most important safety device ever invented: the three-point seat belt. UK autos website Arnold Clark took a look back at what is now the universal modern seat belt, created by Volvo engineer Nils Bohlin in 1959.
@askmenow
Volvo built their reputation on selling safer cars, but they gave away the most important safety device ever invented: the three-point seat belt. UK autos website Arnold Clark took a look back at what is now the universal modern seat belt, created by Volvo engineer Nils Bohlin in 1959.
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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.
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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.
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Why do we blush when we are embarrassed?
AsapSCIENCE explains blushing as a reaction of the sympathetic nervous system and part of our “fight or flight” response. When you're embarrassed, adrenaline is released, speeding up your heart rate and dilating your blood vessels to improve your blood flow and oxygen delivery.
@askmenow
AsapSCIENCE explains blushing as a reaction of the sympathetic nervous system and part of our “fight or flight” response. When you're embarrassed, adrenaline is released, speeding up your heart rate and dilating your blood vessels to improve your blood flow and oxygen delivery.
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What percentage of the world population are left handed?
Left-handedness is less common than right-handedness. Left-handed people are more skillful with their left hands when performing tasks. Studies suggest that approximately 10% of the world population is left-handed. Mixed-handedness is the change of hand preference between tasks.
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Left-handedness is less common than right-handedness. Left-handed people are more skillful with their left hands when performing tasks. Studies suggest that approximately 10% of the world population is left-handed. Mixed-handedness is the change of hand preference between tasks.
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What do penguins drink?
When ashore they will drink fresh water from pools and streams and can sometimes be seen drinking water preened off their backs during rain showers. At sea penguins must drink salt water and they are able to do this because they have special glands abound the eye sockets that extract excess salt from the blood.
@askmenow
When ashore they will drink fresh water from pools and streams and can sometimes be seen drinking water preened off their backs during rain showers. At sea penguins must drink salt water and they are able to do this because they have special glands abound the eye sockets that extract excess salt from the blood.
@askmenow
What makes red blood cells and white blood cells?
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All leukocytes are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.
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White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All leukocytes are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell.
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What animal never stops growing?
The skeletons of most mammals reach a certain size and then stop growing. However, many animals, including some mammals, keep growing throughout their lives. Kangaroos, for example, just keep growing and growing until they die. Most fish, amphibians, lizards, and snakes are also indeterminate growers.
@askmenow
The skeletons of most mammals reach a certain size and then stop growing. However, many animals, including some mammals, keep growing throughout their lives. Kangaroos, for example, just keep growing and growing until they die. Most fish, amphibians, lizards, and snakes are also indeterminate growers.
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What causes red hair?
About 1 to 2 percent of the human population has red hair. Redheads have genes to thank for their tresses. Research shows red hair usually results from a mutation in a gene called MC1R, which codes for the melanocortin-1 receptor. The pigment found in redhair that makes it red is called pheomelanin.
@askmenow
About 1 to 2 percent of the human population has red hair. Redheads have genes to thank for their tresses. Research shows red hair usually results from a mutation in a gene called MC1R, which codes for the melanocortin-1 receptor. The pigment found in redhair that makes it red is called pheomelanin.
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Do cats meow to each other?
Kittens meow to let their mother know they're cold or hungry, but once they get a bit older, cats no longer meow to other cats. But they continue to meow to people throughout their lives, probably because meowing gets people to do what they want.
@askmenow
Kittens meow to let their mother know they're cold or hungry, but once they get a bit older, cats no longer meow to other cats. But they continue to meow to people throughout their lives, probably because meowing gets people to do what they want.
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When does the brain stop growing?
We used to think that the brain was fully developed by very early teenagerhood and we now realise that the brain doesn't stop developing until mid-20s or even early 30s. There's a lot more information and evidence to suggest that actually brain development in various forms goes on throughout the life span.
@askmenow
We used to think that the brain was fully developed by very early teenagerhood and we now realise that the brain doesn't stop developing until mid-20s or even early 30s. There's a lot more information and evidence to suggest that actually brain development in various forms goes on throughout the life span.
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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.
@askmenow
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.
@askmenow