Did the Vikings use crystal 'sunstones' to discover America?

Ancient records tell us that the intrepid Viking seafarers who discovered Iceland, Greenland and eventually North America navigated using landmarks, birds and whales, and little else. There's little doubt that Viking sailors ...

Does lighting pollution poses risk?

A panel of world experts discussed "Light Pollution and its Ecophysiological Consequences" and shed light on the extent of the dangers and harm that night-time artificial lighting causes, emphasizing that it is the short ...

Solar-powered plane's Paris flight abandoned

Swiss solar-powered aircraft Solar Impulse landed in Brussels Saturday after the pilot aborted a flight to Paris following a series of technical problems, his team said.

Meteor showers in Asia disappoint

(AP) -- Thousands of stargazers across Asia stayed awake overnight to catch a glimpse of what was advertised as an intense Leonid meteor shower, but the show fizzled rather than sizzled for many because of cloudy conditions.