Arctic Sea Ice Affects

Polar bear numbers could drop a third by mid-century, according to the first systematic assessment, released Wednesday, of how dwindling Arctic sea ice affects the world's largest bear.

Scientists have announced a potential solution to a tantalizing puzzle about sea-level rise that's remained unsolved for more than a decade. In doing so, they've helped confirm scientists' latest estimates of 20th-century glacial melting and our understanding of how sea-level rise fundamentally affects the planet - down to the way it spins on its a...

Polar bear numbers could drop a third by mid-century, according to the first systematic assessment, released Wednesday, of how dwindling Arctic sea ice affects the world's largest bear.

Scientists have announced a potential solution to a tantalizing puzzle about sea-level rise that's remained unsolved for more than a decade. In doing so, they've helped confirm scientists' latest estimates of 20th-century glacial melting and our understanding of how sea-level rise fundamentally affects the planet - down to the way it spins on its a...