Atlantis Astronauts Explain Their Mission on 'Colbert Report' (VIDEO)

What late-night talk show host can say he's spoken with astronauts while they're floating in outer space? That would be Stephen Colbert on 'The Colbert Report' (weeknights, 11:30PM ET on COM).

"I understand you did replace the batteries," said Colbert. "What does it run on, like double-As?"

"They're about 400 pounds each, so [we] had to do quite a bit of working out in the gym before we went out on those spacewalks," said one Atlantis mission astronaut.

"Wait, I thought nothing weighs anything in space ... Did I just catch you in a space lie?" asked Colbert. The host kept making them laugh, which Colbert took as proof that, unable to defend themselves, the space program must but a big sham.