The Eisenhower interstate system requires that one mile in every five must be straight. These straight sections are usable as airstrips in times of war or other emergencies. Emus cannot walk backwards. There are only thirteen blimps in the world. Nine of the thirteen blimps are in the United States.
Cats have more than one hundred vocal sounds, while dogs only have about ten.
Our eyes are always the same size from birth, but our noses and ears never stop growing. David Prowse was the guy in the Darth Vader suit in Star Wars. He spoke all of Vader's lines, and didn't know that he was going to be dubbed over by James Earl Jones until he saw the screening of the movie. Many hamsters only blink one eye at a time. In every episode of Seinfeld there is a Superman somewhere.