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Richard Branson speaks about new initiative to tackle climate change 04:25
NASA brings asteroid samples back to Earth for first time 00:31
In historic mission, NASA space capsule returns carrying asteroid sample 02:04
Richard Branson on new climate change coalition, return to space 03:27
Watch: Asteroid sample collected by NASA returns to Earth 01:21
Trailblazing NASA astronaut will be first woman on Lunar mission 05:11
Meet the NASA astronaut set to make history in space 04:53
Paging Agent Mulder: NASA to use AI to study UFOs 05:03
NASA astronaut breaks record for longest spaceflight by an American 01:41
Japan launches HII-A rocket to explore the origins of the universe 01:17
SpaceX capsule carrying 4 crew members returns safely to Earth 00:37
Karol Bobko, NASA’s first Challenger pilot, dies at 85 02:06
Pentagon unveils ‘one-stop shop’ site for non-classified UFO docs 00:32
Searching for evidence of interstellar objects 07:17
India’s moon rover takes first steps on south pole’s surface 01:04
NASA delays launch to International Space Station 02:59
Al Roker tests Neil deGrasse Tyson in weather-related space quiz 01:26
Neil deGrasse Tyson talks India landing on the moon’s south pole 02:57
India makes historic landing on moon's south pole 03:38
Watch: The moon's surface from India's lunar probe as it flies to landing zone 00:27
NASA: Astronauts ‘will become role models’ 00:30 NASA Administrator Charlie Bolden introduces eight astronaut candidates who arrived at the agency's Johnson Space Center to begin training. Aug. 20, 2013
Read More UP NEXT
Richard Branson speaks about new initiative to tackle climate change 04:25
NASA brings asteroid samples back to Earth for first time 00:31
In historic mission, NASA space capsule returns carrying asteroid sample 02:04
Richard Branson on new climate change coalition, return to space 03:27
Watch: Asteroid sample collected by NASA returns to Earth 01:21
Trailblazing NASA astronaut will be first woman on Lunar mission 05:11 
