Falcon, Ant-Man, Hawkeye, Captain America, Scarlet Witch and Winter Soldier in Captain America: Civil War

Spider-man flies across the city on his spider silk, one of a number of special powers acquired after the bite of a radioactive arachnid. Tony Stark (...)

Meltwater flows along the Greenland ice sheet, one of the biggest and fastest-melting chunks of ice on Earth. Photograph: Josh Haner/the New York Times

The midnight sun still gleamed at 1am across the brilliant expanse of the Greenland ice sheet. Brandon Overstreet, a doctoral candidate in hydrology a(...)