Disputes in Science & Math
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How many eyes do starfish have?
Filed under: Science & Math
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How many genes do humans have?
Filed under: Science & Math
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How many hearts does an earthworm have?
Filed under: Science & Math
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How many hearts does an eel have?
Filed under: Science & Math
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How many languages are spoken on earth today?
Filed under: Arts and Science & Math
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How many liters in a barrel of oil?
Filed under: Science & Math
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How many megatons was the Tunguska asteroid impact explosion in 1908?
Filed under: Science & Math
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How many muscles are required to blink?
Filed under: Health and Science & Math
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How many of the animal species that have ever lived are still alive today?
Filed under: Science & Math
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How many people die every day?
Filed under: Health, Politics & Law, Science & Math, and Economics
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How many planets are in our solar system?
Filed under: Science & Math
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How many polar bears are there?
Filed under: Science & Math
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How many sets of vocal chords does a cat have?
Filed under: Science & Math
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How many species exist on earth?
Filed under: Science & Math
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How many species exist, excluding bacteria and fungi?
Filed under: Science & Math
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How many species go extinct each day?
Filed under: Science & Math
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How many species have been identified?
Filed under: Science & Math
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How many species of amphibians have been identified?
Filed under: Science & Math
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How many species of animals are there?
Filed under: Science & Math
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How many species of animals have been identified?
Filed under: Science & Math
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How many species of ants are there?
Filed under: Science & Math
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How many species of bats are there?
Filed under: Science & Math
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How many species of birds are there?
Filed under: Science & Math
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How many species of dinosaurs are known?
Filed under: Science & Math
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How many species of fish are known?
Filed under: Science & Math
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How many species of flowering plants are there?
Filed under: Science & Math
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How many species of insects are there?
Filed under: Science & Math
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How many species of mammals are there?
Filed under: Science & Math
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How many species of mushrooms are there?
Filed under: Science & Math
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How many species of reptiles are there?
Filed under: Science & Math