Spacecraft to carry library to Mars

When NASA's newest Mars lander departs Earth this weekend, it will be carrying the words and art of visionaries from Voltaire to Carl Sagan.

The"Visions of Mars" mini-disk secured to the lander will be the first library on Mars ˜ a gift from past and present dreamers to possible future settlers.

"I'm glad you're there and I wish I was with you," Sagan said in a recording made for the mission before his 1996 death. An excerpt from his book"Cosmos" is also on board.

Other musings, in written and audio format, come from Ray Bradbury, Isaac Asimov, Percival Lowell and Kim Stanley Robinson.