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Satellites solve mystery of low gravity over Canada 20:16 10 May 2007 NewScientist.com news service Kelly Young The GRACE satellites have detected changes in the gravitational field over regions of Canada that can be attributed to the crust bouncing back after the melting of a glacier 20,000 years ago and convection in Earth's mantle (Illustration: Science/M Tamisiea) If it seems Canadians weigh less than their American neighbours, they do – but not for the reasons you might think. A large swath of Canada actually boasts lower gravity than its surroundings. Researchers have puzzled for years over whether this was due...

NEW YORK (CNN) – A mysterious red glow above the Pacific Ocean has internet sleuths fishing for answers. From a cockpit 31,000 feet over the ocean, pilot Dustin Maggard saw and photographed a mysterious red glow below. Watch the video report below.

The first of NASA's enormous Space Launch System (SLS) rockets stands as tall as the Statue of Liberty. Towering 212ft above the ground and flanked by its two smaller booster rockets, the core stage of the US space agency's next generation rocket has been photographed, for the first time, in its launch configuration ahead of its maiden voyage later this year. Designed to carry astronauts to the Moon and beyond, this gargantuan launch vehicle will play an integral part in NASA's Artemis program which aims to place astronauts on the Moon before 2030. The other key component will be the...

An unmanned tanker drone successfully refueled a fighter jet in mid-air during a test flight on Friday. The impressive feat, which involved a Navy F/A-18 Super Hornet, demonstrated the significant potential of unmanned tanker drones and could mark the beginning of the end for traditional piloted tanker aircraft. During the test flight, the drone - a Boeing-built device named MQ-25 Stingray - maintained its altitude and speed as the hose extended and the two aircraft briefly linked up to exchange fuel. The test was carried out from the MidAmerica St. Louis Airport in Mascoutah, Illinois. In total, 325lbs of fuel...