Radio waves travel so much faster than sound waves that a broadcast voice can be heard sooner 18,000 km away than in the back of the room in which it originated.
Color of dinosaurs
Scientists aren't sure what color dinosaurs were.
More Science Facts
Argon is used to fill the space in most light bulbs. Neon is used in fluorescent signs. Fluorescent lights are filled with mercury gas.
The smallest transistor is 50-nanometres wide - roughly 1/2000 the width of a human hair.