The Earth is 4.56 billion years old…the same age as the Moon and the Sun.

The Universe contains over 100 billion galaxies.

Somewhere in the flicker of a badly tuned TV set is the background radiation from the Big Bang.

Giraffes often sleep for only 20 minutes in any 24 hours. They may sleep up to 2 hours (in spurts - not all at once), but this is rare. They never lie down.

Every hour the Universe expands by a billion miles in all directions.

The driest inhabited place in the world is Aswan, Egypt where the annual average rainfall is .02 inches.

Quasars emit more energy than 100 giant galaxies.

The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (metres per second – that is equal to 186,287.49 miles per second).