SpaceX's Dragon spacecraft leaves the International Space Station after a month-long mission aboard the orbital outpost. Rough Cut (no reporter narration). Video provided by Reuters: http://www.sciencedaily.com/videos/12470d0f753333b982fb71ae72f4ebee.htm Dragon is the only space station resupply spacecraft able to return to Earth intact. It will return about 2,668 pounds (1,210 kilograms) of science samples from human research, biology and biotechnology studies, physical science investigations and education activities. Experiment samples coming back to Earth will help researchers continue to assess the impact of long-duration spaceflight on the human body. Returning plant samples will aid in food production during future long-duration space missions and enhance crop production on Earth. Crystals grown aboard and returning from the station could help in the development of more efficient solar cells and semiconductor-based electronics. More details and photos of the CRS-3 space station resupply mission here: http://www.spacex.com/news/2014/05/18/crs-3-mission-overview More details on Dragon here: http://www.spacex.com/dragon Dragon is a free-flying spacecraft designed to deliver both cargo and people to orbiting destinations. Dragon made history in 2012 when it became the first commercial spacecraft in history to deliver cargo to the International Space Station and safely return cargo to Earth, a feat previously achieved only by governments. It is the only spacecraft currently flying that is capable of returning significant amounts of cargo to Earth. Currently Dragon carries cargo to space, but it was designed from the beginning to carry humans. Under an agreement with NASA, SpaceX is now developing the refinements that will enable Dragon to fly crew. Dragon's first manned test flight is expected to take place in 2-3 years.