This has been a sensationally hot summer for America, with records breaking daily. But Greenland seems to have just claimed the heat-related phenomenon crown, with 97 percent of its ice sheet turning to slush. The even stranger part? It might be completely normal--at least for now.
Do nanodiamonds prove an asteroid impact killed off North America's massive mammals 13,000 years ago? It depends on which scientist you ask.
A pair of studies published in the last month offer competing theories about whether an extraterrestrial object killed megafauna like woolly mammoths and sabre-toothed cats, along with the Clovis culture of North American human settlers.
Though its cause may still be contentious for some (ahem, Sarah Palin), it is undeniable that Greenland is disappearing at a startling rate as large chunks of ice break off from the mainland and float away as icebergs. Until now, it was commonly thought that the melting and break up of mammoth glaciers was the most dramatic example of Greenland's changing landscape; however, new research shows that the real culprits are dozens of much smaller outflow glaciers dotting Greenland's coast.