By 3.6 billion years ago, Mars should have become too cold for liquid water, but something kept the rivers flowing.

New research suggests that about 3.6 billion years ago, Mars featured vast water flows and a lake rivaling the size of the ...

Insulation provided by carbon dioxide ice above the martian polar caps could explain many of the Red Planet’s ancient river ...

On a cold, ancient Mars, rivers flowed and a lake the size of the Mediterranean Sea swelled under the protection of thick ice ...

Warming temperatures may be changing the ways ice forms, making it more likely to stick to and injure polar bears in two far ...

The persistent reduction in polar ice contributes to broader ecological changes and heightened ... This is because while bright sea ice reflects most of the Sun’s energy back to space, open ocean ...

which would help thaw and dislodge the ice chunks because the water is warmer than the air temperature. Researchers have studied the population of polar bears since the 1990s and have never seen ...

Researchers observing polar bears in two different populations in northern Canada and Greenland found that some of the bears ...

They will also jump out of the water onto the sea ice to grab an unsuspecting seal. Polar bears spend about 50% of their time hunting, and only two out of ten seal hunts are successful.

The heavy polar bears break through the ice crust, injuring their paws on its sharp edges ... which would help thaw and dislodge any accumulated ice from their feet, due to the warmer water ...