A killer whale's heart beats 30 times a minute under water, 60 times a minute on the surface.
It takes the stomach an hour to break down cows' milk.
In 1830, the first U.S. Steam locomotive built for railroad use was put into service in the state.
NASA has awarded five-year grants, averaging $7 million each, to 10 research teams from across the country, including two from NASA's Jet Propulsion Laboratory.
The most populated city in the world is Tokyo, with 30 million residents.
If you are afraid of darkness it's called achluophobia.
An engineering marvel of the ancient world, Cloacus Maxima, is the sewer of Rome.
A hardboiled egg will spin. An uncooked or softboiled egg will not.
Every day more money is printed for Monopoly than for the US Treasury.
The two-foot long bird called a Kea that lives in New Zealand likes to eat the strips of rubber around car windows.