Jim Free, associate administrator at NASA, is set to retire on Feb. 22 after three decades of service.

NASA Associate Administrator Jim Free retires after 30+ years, leaving a legacy of leadership in space exploration.

Astronauts hoping to minimize the health risks of long space trips to Mars or the moon should avoid the treadmill and do ...

Carved onto slabs of black marble, the names of 11 young men from the Russian town of Semibratovo who died fighting in ...

Mashable is a global, multi-platform media and entertainment company.