How Can a Hummingbird Stand Still in the Air?
How Can a Hummingbird Stand Still in the Air? A hummingbird can stand still, or hover, in the air because its wings move very fast. When hovering, a hummingbird...
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Why Do Mexican Jumping Beans Jump?
Why Do Mexican Jumping Beans Jump? A jumping bean’s movement is caused by a larva, or caterpillar, wriggling around inside it. The “beans” are...
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How Do Sailboats Sail into the Wind?
How Do Sailboats Sail into the Wind? Sailboats cannot sail directly into the wind. They can, however, sail upwind by following a zigzag course so that the wind pushes...
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Why Do We Celebrate Labor Day?
Why Do We Celebrate Labor Day? The first Monday of September means that white clothes are out, sales are in, summer holidays are over and classes begin. For many of us...
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What Causes the Change of Seasons?
What Causes the Change of Seasons? The movement of the Earth around the sun causes the seasons. The Earth is tipped slightly as it moves along its path around the sun....
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