While terrifying, there's an overlooked NASA spacewalk which looks equally terrifying to untrained Earth-dwellers. In 1984, ...

This was the first untethered spacewalk in history. For 6 hours and 17 minutes, McCandless became a speck in the vastness of space; flying around with no cables to hold him from going loose.

Since those early steps, extravehicular activity has helped provide the solutions to many problems that astronauts face in ...