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Zac Unger moved to Churchill, Manitoba, to cover the decline of the polar bear. It was 2008, and the adorable predators had become symbols in the battle over climate change. But the story he ended up writing in his new book was more complicated than he expected.

The owner of a 12-foot alligator recently seized by conservation officers is fighting for its return, saying the reptile he has shared a home with is a gentle giant that's no danger to anyone.

The second volume in Pulitzer-winning historian Rick Atkinson's planned trilogy on the American Revolution publishes Tuesday. Plus a graphic memoir, short fiction, and "the secret life" of a cemetery.

Hundreds of swimmers in Chicago joined the first open-water event on the Chicago River in a century, celebrating the city's progress in restoring a waterway once considered a toxic wasteland.

Hundreds of swimmers in Chicago joined the first open-water event on the Chicago River in a century, celebrating the city's progress in restoring a waterway once considered a toxic wasteland.

New research says climate change has caused toxic metal pollution to double in some Colorado rivers and mountain streams. It's complicating efforts to clean up abandoned mining sites.

On a trip to Kenya, a first for a sitting president, Barack Obama took advantage of his heritage. The first Kenyan-American president wrestled with tension between his office and family obligations.

Technology enabling virtual fences for pets is now being adapted for livestock. Ranchers near Yellowstone National Park are testing its ability to keep cows safe from grizzly bear attacks.

In 2019, Texas became one of the last coastal states to allow oyster farming. Now the first farms have had their initial harvests. It spells good news in the face of rising seas due to climate change.

Engineers at Jeff Bezos' space company Blue Origin are trying to figure out why their massive New Glenn rocket exploded on its launch pad Thursday night.