Why Do Jumping Beans Jump?
Why Do Jumping Beans Jump? A jumping bean’s movement is caused by a tiny insect that lives inside the bean. A jumping bean is the seed of a shrub that grows in...
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Is It Natural to Swing Your Arms When Walking?
Is It Natural to Swing Your Arms When Walking? For a long time, scientists thought that swinging your arms while walking served no purpose. Their best guess was that it...
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How Do Sea Stars Eat?
How Do Sea Stars Eat? In recent years, starfish have been more correctly renamed “sea stars,” because they are not fish. They are echinoderms and related to sand...
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What Causes Seasickness?
What Causes Seasickness? Seasickness is a form of motion sickness characterized by a feeling of nausea experienced after spending time on a ship. It is caused by the...
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Why Do My Muscles Grow Tired When I Exercise?
Why Do My Muscles Grow Tired When I Exercise? If you use your muscles for a long time when you exercise, a waste material called “lactic acid” collects in...
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