For the first time, NASA will take questions from Twitter during news briefings about upcoming International Space Station missions on Tuesday, March 20, at the Johnson Space Center in Houston.

HOUSTON, March 19, 2012 /PRNewswire-USNewswire/ -- For the first time, NASA will take questions from Twitter during news briefings about upcoming International Space Station

NASA's Johnson Space Center in Houston will hold two briefings Tuesday, March 20, to preview the upcoming International Space Station Expedition 32 and 33 missions. NASA Television and the agency's website will broadcast the briefings live.

HOUSTON, March 5, 2012 /PRNewswire-USNewswire/ -- NASA's Johnson Space Center in Houston will hold two briefings Tuesday, March 20, to preview the upcoming International Space Station Expedition

Sixty space experiment proposals have been selected as finalists in the YouTube Space Lab student science competition, co-sponsored by ESA. Judges must now select the two top entries to be flown on the International Space Station.