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are dolphins smart..mp4
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are preservatives bad for you..mp4
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are wisdom teeth still useful..mp4
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are you afraid of heights..mp4
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babies or adults, who has more bones..mp4
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can pure oxygen kill you..mp4
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can you _hear colors_ or _see sounds_..mp4
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common name of table sugar..mp4
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do animals live longer than humans..mp4
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how are smartphones changing us..mp4
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how do animals hibernate..mp4
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how do fish breathe underwater..mp4
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how do migratory birds find their way..mp4
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how do we know that our stomach is full..mp4
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how does anesthesia work..mp4
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how does the moon cause tides..mp4
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how tall can we grow..mp4
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how tattoo removal works..mp4
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how to stop a sneeze..mp4
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is it bad to hold our urine..mp4
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is radiation harmful..mp4
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is sitting bad for you..mp4
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is sleeping in contact lenses bad..mp4
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is sugar bad for you..mp4
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what causes wrinkles..mp4
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what happens to our body after we die..mp4
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what if we stopped drinking water..mp4
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what is a hangover..mp4
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what is blood rain..mp4
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what is constipation..mp4
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what is depression..mp4
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what is diabetes..mp4
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what is iris..mp4
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what is migraine..mp4
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which is the best sleeping position..mp4
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why are fish eating plastic..mp4
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why are giraffes so tall..mp4
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why do ants walk in a straight line..mp4
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why do cats have vertical pupils..mp4
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why do cats purr..mp4
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why do dead whales explode..mp4
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why do elephants never forget..mp4
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why do humans love music..mp4
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why do my grannys legs pain..mp4
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why do our fingers get wrinkly..mp4
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why do people grind their teeth..mp4
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why do snakes have forked (split) tongue..mp4
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why do snakes shed their skin..mp4
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why do some people sweat more than others..mp4
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why do we feel butterflies in our stomach..mp4
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why do we love chocolates..mp4
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why do we scratch our itch..mp4
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why do we sleep..mp4
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why does my dog stink when it is wet..mp4
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why does salt make food taste better..mp4
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why dont penguins feet freeze..mp4
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why is it hard to cure alzheimers disease..mp4
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why is it hard to cure cancer..mp4
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why is it hard to cure hiv _ aids..mp4
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why smoking makes people look old..mp4
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