Big Picture Science – Getting a Spacelift: Shannon Walker
by Gary Niederhoff on February 6, 2012
Part 2 of Getting a Spacelift, featuring Shannon Walker, NASA Astronaut, discussing how her work at the Aquarius Underwater Laboratory will prepare astronauts for missions to low gravity asteroids. (TRT 9:09)
Could your favorite Earthling also be your favorite Martian?
Allow me to respond: The answer is "yes." It's possible that billions of years ago, tiny bits of biology quit the Red Planet and infected ours. If so, your family tree -- and that of every other terrestrial life form -- has its deepest roots not in the ancient oceans of Earth, but... (read more)