New Mars odyssey about to begin CNN

Beginning a new chapter in Mars exploration, NASA expects to launch Saturday a powerful new orbiter to scour the red planet for evidence of underground water and geologic hot spots. The $300 million Mars Odyssey will become the first spacecraft launched to the red planet since two disastrous failures in 1999. Mars Odyssey will search for water, map surface minerals and measure radiation levels — observations that could provide clues about possible extraterrestrial life.