The Falcon 9 rocket was carrying supplies to the International Space Station when it exploded June 28. Musk, the SpaceX CEO, said that going forward, the company will individually test each strut.
New Horizons has provided us with our first close look at Pluto. The images are blowing the minds of scientists. NPR's Scott Simon reflects on the joy of these new discoveries.
The latest photos show ice plains that appear to be only 100 million years old and a hilly region that could be what is left when surrounding material is eroded away.
What are the obstacles that keep adults off the field? How can sports help keep kids and adults in good health? What are the best ways to encourage more widespread and enduring participation?
New Horizons team scientist Carly Howett says no one expected the kind of geologic activity that the spacecraft appears to have found on the dwarf planet and its moon.
Clyde Tombaugh, the man who discovered Pluto, grew up under the dark, open skies of the rural Midwest. Streator, Ill., where he once lived, has been full of celebration during NASA's flyby this week.