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Earth's temperatures will likely stabilize for a period as deep ocean waters absorb enough heat to mask the effects of global warming for up to a decade, a new study indicates. Earth's "missing heat" has long been a mystery for climate scientists as the last decade saw an incessant growth in greenhouse gas emissions did not elevate surface temperature as much as expected. The joint U.S.-Australian study, based on computer simulations of global climate, points to ocean layers deeper than 1,000 feet (300 meters) as the main location of the "missing heat" during periods such as the past decade when...

Rising greenhouse emissions may tip off aliens that we are a rapidly expanding threat, warns a report for Nasa It may not rank as the most compelling reason to curb greenhouse gases, but reducing our emissions might just save humanity from a pre-emptive alien attack, scientists claim. Watching from afar, extraterrestrial beings might view changes in Earth's atmosphere as symptomatic of a civilisation growing out of control – and take drastic action to keep us from becoming a more serious threat, the researchers explain. This highly speculative scenario is one of several described by scientists at Nasa and Pennsylvania State...