The use of objects for exchange goes back to ancient times. Sometimes people would barter things directly, but they also used currency to trade goods. Natural items like shells were used as money to make trading easier.The shekel in Mesopotamia—the oldest known CURRENCY—was used about 5,000... Read more
Recent Features
Top Image: Lorelyn Medina/ShutterStock.com
When you share a delicious meal with your family this holiday season, will you be grateful to dad for smoking the turkey? Will you thank your mom for making your... Read more
Wildlife Conservation Around the Globe—Begins at Home!
The Phoenix Zoo Helps Native Ferrets Avoid Extinction
... Read more