Sarah Kaplan

Climate reporter Sarah Kaplan reports from the Greenland Ice Sheet where researchers drill deep into the ice with hopes to better understand climate change.

• Climate

Scientists journeyed to Greenland in an unprecedented experiment to drill for rocks beneath the ice sheet. But a crack in the ice threatened their mission — and their ability to predict the fate of the warming world.

• Environment

A new analysis suggests climate change could shut down the circulation of Atlantic Ocean currents by 2050. But outside researchers say more data is needed.

• Environment

Long-lost samples of twigs and rocks show that Greenland once lost a tremendous amount of ice under climate conditions very much like the ones humans have created and are currently living in — implying coasts could soon be submerged under several feet of sea level rise.

• Climate

Massive floods. Record heat. Extreme ocean temperatures. Forest fires burning out of control. Climate alarm bells are ringing all over the planet.

Sediments at Crawford Lake in Ontario represent the impact human pollution has had on the environment since the mid-20th century, a group of scientists says.

• Environment

Scientists say Crawford Lake holds the best evidence for humanity’s overwhelming impact on the Earth -- and should be the 'golden spike' for a new geologic epoch.

Canada's Crawford Lake may hold evidence that humans have fundamentally changed Earth enough to have started the Anthropocene, a new chapter in geologic time.

• Perspective

Peru’s “Route of Climate Change” takes visitors to a melting glacier — and aims to teach them along the way.