You probably keep a jar or a drawer full of pennies and wonder what happens if the U.S. Mint stops making them. You'll learn ...

You probably keep a jar or drawer full of pennies and suddenly wonder what they mean now that production has stopped. You can ...

Austrian researchers say they've found the first known example of tool use by cattle, courtesy of a Swiss-Brown cow named Veronika. Scientists have documented a lot of animals that use tools, like ...