Hack gave GCHQ and NSA access to billions of calls and mobile data, according to new Snowden leak
Don't panic: the asteroid will miss us by a comfortable 745,000 miles – but nothing will get closer until 2027
Mission will be like 'trying to balance a rubber broomstick on your hand in the middle of a wind storm'
Extra second needed this summer to allow atomic time to synchronise with the Earth's rotation
Maiden flight of capsule that could help humans reach the Red Planet heralded as a 'landmark moment'
Rumours circulating online suggested that a massive solar storm would lead to six days of darkness this month
The tech giant has leased an airfield from Nasa as the space agency tries to reduce its footprint on earth
Five of the best viral videos of the week, hand-picked by our video partner 5by
Cargo rocket carrying supplies for astronauts on the International Space Station bursts into flames
Russia's space agency says it has discovered sea plankton in space – but Nasa isn't convinced