Cheryl Katz

Small pests, big problems: The global spread of bark beetles.

Warming temperatures are fueling the expansion of pine and spruce beetle outbreaks across North America, Europe, and Siberia, ravaging tens of thousands of square miles of woodlands. Scientists warn that some forest ecosystems may never recover.

Small Pests, Big Problems: The Global Spread of Bark Beetles

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Northern lights: Large-scale solar power is spreading across the US.

Northern Lights: Large-Scale Solar Power is Spreading Across the U.S.

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The uncertain future of puffin for dinner.
Jerold Paterson/flickr

The uncertain future of puffin for dinner.

A wheel of wings spins around Grímsey Island, Iceland’s northernmost outpost. This eyebrow of land 40 kilometers above the mainland crosses the Arctic Circle. It’s home to some 70 residents, with one street, a tiny grocery store, a slash of airstrip roughly a third the length of the island, and a signpost pointing to the 66°33’ N parallel, across which tourists drive golf balls into the Arctic. In the brief high North summer, the island belongs to seabirds. Thousands and thousands of kittiwakes, puffins, Arctic terns, and more transform Grímsey into a bird nursery bustling under the constant light of the midnight Sun. Birds nestle in sea cliffs, brood in wildflower-filled meadows, patrol rocky burrows, and raft on the cold North Atlantic waters. And they cluster on the tarmac, erupting in clouds when planes ferrying day-trippers circle in.

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As groundwater dwindles, a global food shock looms.

By mid-century, says a new study, some of the biggest grain-producing regions could run dry.

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Why cougars are coming to town.

Cougars will become increasingly common visitors to Southwestern cities like Las Vegas in the next few decades as climate change drives their prey to greener urban pastures, a new study suggests.

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One of the world's most unusual plants is disappearing.

Overlooking the lava spires of Lake Mývatn, inside an old white farmhouse, in a jar by the window, slumped in a cloudy green bath, Iceland’s last living lake ball is slipping away.

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Winged Warnings: A perilous journey

Winged Warnings: A perilous journey

The woman cowers inside a phone booth as a fury of birds tears through town. Demented seabirds hurl themselves at the windows, cracking the glass. Outside, beaks and claws swirl over bloody bodies in the streets.

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Winged Warnings: Empty nests of the North
Cheryl Katz

Winged Warnings: Empty nests of the North

FLATEY ISLAND, Iceland – When the days grew long, seabirds flocked to this hamlet on the edge of the Arctic to rear their chicks under the midnight sun.

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katharine hayhoe

Peter Dykstra: Journalists I’m thankful for

My third annual list of the over-achieving and under-thanked.

WATCH: The latest evidence of widespread sperm count decline

WATCH: The latest evidence of widespread sperm count decline

"Pregnant women, and men planning to conceive a pregnancy, have a responsibility to protect the reproductive health of the offspring they are creating."

pacific salmon

Car tire chemicals are killing salmon and steelhead

The chemical 6PPD, added to tires to prevent degradation, is causing a “complete breakdown of the blood brain barrier” in fish, a new study found.

sperm count decline shanna swan

A new analysis shows a “crisis” of male reproductive health

Global average sperm count is declining at a quicker pace than previously known, chemical exposure is a suspected culprit.

PFAS Testing

Investigation: PFAS on our shelves and in our bodies

Testing finds concerning chemicals in everything from sports bras to ketchup, including in brands labeled PFAS-free.

sperm count decline

Frequently asked questions on the new sperm count decline study

Sperm counts are declining everywhere — the implications are huge.