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 ...

A climate tipping point is a critical threshold where a small environmental change can lead to dramatic and often ...

In two recent studies, researchers suggest a weakening ocean current system is to blame for a persistent cold spot in the ...

A massive and surprising change is unfolding around Antarctica. Scientists have discovered that the Southern Ocean is getting ...

The ocean around Antarctica is rapidly getting saltier at the same time as sea ice is retreating at a record pace.

An unprecedented Arctic heat wave caused record high temperatures in Greenland and Iceland, raising major concerns among ...

A patch of the Atlantic Ocean just south of Greenland is cooling while much of the world warms. The origin of this "cold blob ...

First created during the Cold War, Project Iceworm saw the US plan to store hundreds of ballistic missiles in a system of ...

As the ice on Greenland retreats today, it’s causing the sea level nearby to fall, rather than rise. Only as far as Scotland, some 1,500 miles from Greenland, does this sea level fall switch to ...