To escape the Earth's gravity a rocket need to travel at 7 miles a second.

Humans have 46 chromosomes, peas have 14 and crayfish have 200.

The largest desert in the world, the Sahara, is 3,500,000 square miles.

Wilhelm Rontgen won the first Nobel Prize for physics for discovering X-rays in 1895.

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

The world's smallest winged insect, the Tanzanian parasitic wasp, is smaller than the eye of a housefly.

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

The Earth spins at 1,000 mph but it travels through space at an incredible 67,000 mph.