Hilarious Teachers Who You Wish You Had In High School

The More You Know

• An oyster's sex is fluid.
• The sun and moon appear to be the same size in the sky because of an astonishing coincidence: the moon is 400 times smaller but 400 times closer.
• North Korea and Cuba are the only places you can't buy Coca-Cola.
• The world's largest Barbie collection includes more than 15,000 dolls.