Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.
In the tropics, the border between troposphere and stratosphere—the tropopause—sits at around 20km, far above any normal ...
As human activity grows in the Arctic, underwater noise is spreading through icy waters, disrupting how many animals ...
“The presence of liquid water [on Mars] is a broad topic that includes rains, rivers, lakes, as well as oceans,” says Ezat ...
As Trump points to Russia and China near Greenland, experts say the biggest Russian and Chinese activity is elsewhere in the Arctic.