Marcia Dunn
7 Earth-size worlds found orbiting star; could hold life Marcia Dunn
Spotlight shining on Pluto on cold outskirts of solar system Marcia Dunn
SpaceX Dragon set to blast off to space station Marcia Dunn
Weird news of the day Marcia Dunn
Dragon arrives at space station in historic 1st Marcia Dunn
Space Shuttle Atlantis
Last space shuttle comes home, ends 30-year era Marcia Dunn
Space Shuttle
Next-to-last space shuttle flight lands on Earth Marcia Dunn
Space Shuttle
NASA clears space shuttle for Monday launch Marcia Dunn
Space Shuttle
Astronauts back for next-to-last shuttle flight Marcia Dunn
Space Shuttle
NASA: Endeavour's last launch delayed again Marcia Dunn
Gabrielle Giffords, Mark Kelly
NASA: Giffords' astronaut husband going to fly Marcia Dunn
Gabrielle Giffords, Mark Kelly
Giffords' husband faces troubling predicament Marcia Dunn
Challenger Anniversary
NASA marks 25th anniversary of Challenger accident Marcia Dunn
Shuttle launch off until end of month to fix leak Marcia Dunn
Millionaire's test rocket reaches orbit on 1st try Marcia Dunn