For decades, scientists believed the Arctic Ocean was sealed under a massive slab of ice during the coldest ice ages — but new research proves otherwise. Sediment samples from the seafloor, paired ...

A salty surge in the Southern Ocean is melting Antarctic sea ice from below — and causing dramatic changes scientists didn’t ...

Arctic sea ice, not a thick ice shelf like what we observe in Antarctic today (above), shaped the far north for 750,000 years. Photo credit: Matthias Forwick.

For years, scientists have debated whether a giant thick ice shelf once covered the entire Arctic Ocean during the coldest ...

Ice loss in Antarctica and its impact on the planet—sea level rise, changes to ocean currents and disturbance of wildlife and ...

The dramatic loss of sea ice around Antarctica has occurred with the re-emergence of the Maud Rise polynya in the Weddell Sea ...