
The first U.S. cents were 100 percent copper, while today’s pennies are 95 percent zinc with a copper coating measuring only 1/2000th of an inch.

The first U.S. cents were 100 percent copper, while today’s pennies are 95 percent zinc with a copper coating measuring only 1/2000th of an inch.

Humans accidentally created a protective bubble around Earth. Decades of use of very low frequency (VLF) radio communications have resulted in an artificial cocoon that could help protect the planet from solar flares and radiation particles.

The state that produces enough cotton each year to make two T-shirts for every American (that’s 599 million tees).