Why is an ocean current critical to world weather losing steam? Scientists search the Arctic for answers.

A conveyor belt of ocean water that loops the planet and regulates global temperatures could be heading for a tipping point.

Sea ice over the Greenland Sea near northeast Greenland. Arctic sea ice this summer was the second lowest on record, and ocean changes in the Arctic could dramatically change the climate for much of the rest of the planet.
Photograph by Lawrence Hislop

Read This Next

Humans are creating hot spots where bats could transmit zoonotic diseases

‘Lake bagging’ is trending. What is it, and how can you do it safely?

Too hot to live: Millions worldwide will face unbearable temperatures

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet