Watch These Stunning Models of the Largest Star Map Ever Created

Trouble Detected in Infamous Dark Matter Signal

New results from a decades-old experiment were initially touted as further evidence for dark matter. But independent scientists have cast serious doubt on that claim, leaving most everyone puzzled.

NASA’s Got a Plan for a ‘Galactic Positioning System’ to Save Astronauts Lost in Space

Rolls-Royce and Boeing invest in UK space engine

Key technologies include a compact pre-cooler heat-exchanger that can take an incoming airstream of over 1,000C and cool it to -150C in less than 1/100th of a second. This would permit Sabre to use oxygen direct from the atmosphere for combustion instead of carrying it in a tank with the weight penalty that implies.