Twenty years to the day since Yuri Gagarin flew in Vostok 1, the world’s first reusable spacecraft – and the most complex spacecraft ever built – was launched into orbit by the US.

This telescope was used on board HMS Discovery during the British Arctic Expedition from 1875-76. It was also used on Captain Robert Falcon Scott's National Antarctic (Discovery) Expedition from ...

HOUSTON, Texas (CNN) -- A pair of overqualified, overachieving electricians latched a pair of voltage regulating boxes to the International Space Station on Tuesday. NASA spacewalkers Bill ...