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What Is a Birthstone?
What Is a Birthstone? A birthstone is a gem which is a symbol of the month of a person's birth. Birthstones are and can…
What Causes the Play of Colors in a Soap Bubble?
What Causes the Play of Colors in a Soap Bubble? The shimmering colors we see in a soap bubble are caused by the interference…
Why Do Crocodiles Eat Rocks?
Why Do Crocodiles Eat Rocks? Crocodiles swallow rocks to aid in grinding food for digestion. The crocodile swallows its prey whole, or tears
Do Animals Talk to Each Other?
Do Animals Talk to Each Other? Many animals do talk to each other, but not with words the way people do. Animals communicate with…
How Did the First Clocks Work?
How Did the First Clocks Work? The earliest known clocks are sundials. In the ruins of Egypt, a giant sundial, almost 100 feet tall,…