A new study shows how thawing permafrost and intensifying storms will change how water moves into and through Arctic rivers.

The early heat melted snow and warmed rivers, heating up the land and downstream ocean areas. The effects harmed salmon fisheries, melted sea ice and fueled widespread fires.

To fully understand the extent of climate-related dangers the Arctic – and our planet – is facing, we must focus on organisms too small to be seen with the naked eye.

A short history of predicting an ice-free Arctic – and why you should listen to this one.

Arctic sea ice algae contaminated with microplastics have serious consequences for ecosystems and the climate.

A particularly stormy winter has pushed perennial sea ice into the Arctic melt zone.

Russia is attempting to claim more of the Arctic seabed – an area rich in oil, gas and minerals – and its fleet of icebreakers is helping shipping expand. The US needs some creative ideas to catch up.

Whales are rediscovering their old haunts in the Arctic and Southern oceans after centuries of hunting.