Moon Rocks, Martian Meteorites and More at the NASA Astromaterials Lab

Carlton Allen is Curator of the only facility of its kind on Earth, the Johnson Space Center Astromaterials Lab. He talks about the past accomplishments, including a half-ton of Apollo moon rocks, current research, and how the Lab is preparing for the exciting arrival of more extraterrestrial materials from comets, the Sun and Mars.

Emily Lakdawalla explains how the tallest mountain on Venus can go without a name. Bruce Betts tells us what to look for in the sky and what to look for in our next trivia contest.