1) The speed of light is approximately 299,792,458 meters per second.

2) The Great Barrier Reef in Australia is the largest living structure on Earth and can be seen from space.

3) The first successful consumer digital camera, the Apple QuickTake 100, was released in 1994 and had a resolution of 640 x 480 pixels.

4) The world's first car radio was invented in 1929.