Zero is the only number that cannot be represented by Roman numerals.
Peanut oil is used for cooking in submarines because it doesn't smoke unless it's heated above 450F.
In ancient Greece , tossing an apple to a girl was a traditional proposal of marriage. Catching it meant she accepted ( if she throughs it back - Run!
Intelligent people have more zinc and copper in their hair. ( Guess I need to eat a penny)
The Swine Flu vaccine in 1976 caused more death and illness than the disease it was intended to prevent.
Caffeine increases the power of aspirin and other painkillers, that is why it is found in some medicines
Everything weighs one percent less at the equator. ( Yep I am moving )
The military salute is a motion that evolved from medieval times, when knights in armor raised their visors to reveal their identity.