Mars

Mars is the most exciting planet for scientists because its mild temperature is more like the Earth's than any of the other planets. Proof suggests that Mars once had rivers, streams, lakes, and even an ocean. As Mars' atmosphere slowly depleted into outer space, the surface water began to permanently evaporate. Today water on Mars in either frozen in the polar caps or underground. Mars is also referred as the "Red Planet" because the surface of Mars is red.

In Greek, Mars was known as Ares. Assuming you weighed 70 lbs (32 kg) on the Earth, you would weigh about 27 lbs (12 kg) on Mars.