Climate Change

Marine wildlife is starting to suffocate

Global warming and agricultural runoff have driven the loss of oxygen in oceans around the world, with looming ecological consequences.

Photograph of three people in hiking gear walking on gravel alongside a winding creek. There are conifers growing to the side, and clouds plus a large body of water in the distance.

Living World

As glaciers retreat, new streams for salmon

Ecologist Sandy Milner has traveled to Alaska for decades to study the development of streams flowing from melting glaciers. He’s seen insects move in, alders and willows spring up, and spawning fish arrive in thousands.

Photograph of vegetation-covered mountain rising above desert lowlands.

Living World

Hunting sky islands for genetic clues to climate resilience

OPINION: Isolated mountaintops are hotbeds of evolutionary adaptation and great places to study how climate change affects ecosystems

Panoramic image of a fragment of Amazon forest with sectors of tree-covered and deforested land as well as a section with remains of forest that was burned.

Food & Environment

Losing the connection between the Andes and the Amazon: A price of peace in Colombia

The South American country, where the biodiversity of the Andes meets that of the Amazon, is losing the great natural wealth of some 1,500 square kilometers of forest each year, mainly in areas formerly under guerrilla control

Photograph of a forest of conifers. A sign reads “ASCC TRANSITION.”

Food & Environment

Moving trees north to save the forests

As the world warms, trees in forests such as those in Minnesota will no longer be adapted to their local climates. That’s where assisted migration comes in.

Photograph of a pile of oyster shells with water in the background.

Food & Environment

Shucking the past: Can oysters thrive again?

Dredging and pollution devastated the once-bountiful reefs. Careful science may help bring them back.

Close-up of an alligator partially submerged in green water with only its snout and eyes visible.

Food & Environment

Tracking down the hidden pollutants that make wildlife sick

A new technique for detecting unknown and unlooked-for chemicals is revealing dozens of contaminants in alligators, sea lions and condors

Photograph of sandy sea bottom covered in round nodules. The light is dim and greeny blue.

Physical World

Mining the deep ocean

Renewable technologies need a multitude of critical minerals. The seabed could supply these riches. But at what cost?

Black-and-white collage of beautiful small shells

Living World

The history of the ocean, as told by tiny beautiful fossils

Bountiful remains of foraminifera reveal how organisms responded to climate disturbances of the past. They can help predict the future, too.

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Climate Change

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