Will the real ET be little green men or little green bacteria? SETI Institute Senior Astronomer Seth Shostak theorizes what our first alien encounter might be like.
After a three-billion mile journey into the outer reaches of the solar system, the Stardust spacecraft has landed at it's permanent home. Dave Mosher brings us up to speed. Kasey-Dee Gardner produces.
NASA just smashed the LCROSS and spent Centaur rocket into the moon in a search for water on the lunar surface. Even better - the impact was captured on video! Did it live up to the hype? James WIlliams takes a look.
Has the lost army of Cambyses II been found? The Persian army of 50,000 soldiers supposedly perished in a sandstorm in ancient Egypt 2500 years ago. Researchers have located a valley of bones they think may belong to the fabled army.
The Hubble Space Telescope wouldn't work without Jill McGuire. That's because she and her team help build the tools that keep it running. She talks to Jorge Ribas about her cool job.
Can you REALLY tell if your friend is lying to you? As it turns out, probably not. James Williams isn't lying when he says deception is a tricky thing.
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