A robotic space plane has been speeding in low Earth orbit, with some saying that it`s a weapon, while others claim it to be a data-gathering mission.
A US-led research team studying a new ice core from West Antarctica found that warming there was well under way 20,000 years ago.
The official onset of winter and the beginning of the end for long, dark nights in the northern hemisphere is marked by the winter solstice.
The unmanned $170 million Phobos-Ground was launched two weeks ago and reached preliminary Earth orbit.
A Russian spacecraft on its way to Mars with 12 tons of toxic fuel is stuck circling the wrong planet: ours. And it could come crashing back to Earth in a couple of weeks if engineers can`t coax it back on track.
A new US Air Force satellite will provide a full-time surveillance of thousands of pieces of debris circling the Earth.
Day in Pics: 21st December
Showbiz World - December 21, 2014
People Magazine Awards 2014