Moose Whose Lingering Closed Mountain Trail for 2 Months Is Euthanized

New York environmental conservation officials had observed a sharp decline in the animal’s health that gave it “a low likelihood of survival.”

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Denver Museum Finds a Dinosaur Fossil Under Its Parking Lot

The fossil, estimated to be about 70 million years old, was found during a drilling project.

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The Tick Situation Is Getting Worse

As temperatures rise, ticks of all kinds are flourishing in ways that threaten people’s health.

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The Hiker Who Couldn’t Be Found

Forest rangers rescue almost every hiker who gets lost or injured in the Adirondack Mountains. A 22-year-old college student was the rare exception.

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Mount Everest’s Record-Setting Sherpa Sees a Future of Snowless Mountains and Fewer Guides

Kami Rita Sherpa scaled Mount Everest for the 31st time on Tuesday. We spoke to him about what is next for the mountain.

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They Inhaled a Gas and Scaled Everest in Days. Is It the Future of Mountaineering?

A group of British men went from London to the summit of Everest and back in less than a week with the help of xenon gas. Mountaineers and the Nepalese government weren’t pleased.

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150 Years of Change: How Old Photos, Recaptured, Reveal a Shifting Climate

In the heart of Utah’s Uinta Mountains, a team of scientists is re-creating historical pictures to study how much, and how quickly, ecosystems are changing.

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3 Climbers From the U.S. and Canada Have Gone Missing on New Zealand’s  Highest Mountain

Two Americans and a Canadian were climbing Mount Cook before failing to show up to a prearranged flight on Monday.

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