One moment occurred in 1984 when NASA astronaut Bruce McCandless II became the first human to spacewalk or float free from any earthly anchor when he stepped out of the space shuttle Challenger and ...

For a brief period in the 1980s, astronauts went untethered outside their space capsule, flying with jet packs. The photos ...

When astronaut Bruce McCandless II drifted away from the safety of the Space Shuttle in 1984, it was terrifying. Not just for ...

Bruce McCandless II during a panel discussion marking the 25th anniversary of the Hubble Space Telescope in 2015. Most of us know Bruce McCandless II by the famous photograph taken by fellow ...

The Manam Volcano, as seen in 2010, is located a few miles off the coast of Papua New Guinea and forms a six-mile-wide island. It's hard to say what caused the white plume, but it's likely ...