Astronaut Nichole Ayers recently witnessed a phenomenon known as a sprite from the International Space Station.

Here’s how it works. (Image credit: ESA. Courtesy of MPAe, Lindau) On July 2, 1985, the European Space Agency launched the Giotto space probe to get a close-up look at Halley's Comet.

After many sequels and spin-off titles, people still continue to highly praise the Metroid games as must-play experiences for ...