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New data from 2.5 million marathon finishers finds that subtle changes in air quality can affect your race time ...

Awe doesn’t have to be reserved for far-flung places. Instead, take a moment to learn about the landscape just outside your ...

If you plan to spend multiple, consecutive days in the same pair of socks this winter, socks with high wool content are the ...

Five questions with UCLA climate scientist Daniel Swain, who warned of “extreme fire danger” in Southern California days ...

The EXPLORE Act aims to address the housing crisis in gateway communities, increase outdoor access for veterans, kids, and ...

In last days of his presidency, Biden adds more protected sites to a long list of conservation accomplishments ...

When our trail columnist first started sliding silicone spacers between his toes, friends chuckled. But now these little separators are getting the moment they deserve.

Our national parks are called America's Best Idea for a reason. Here's how to have the most epic adventures in the most ...

Tina Lewis was enjoying a “trip of a lifetime” before she was detained at an airport in India. Her crime: traveling with a ...

A weather phenomenon coated the peak in glaze ice for a few glorious hours in November. Employees at the observatory grabbed their skates and made the most of it. Enjoy coverage of racing, history ...

Ben Patrick is better known as the Knees Over Toes guy: a viral internet personality who believes that the oldest rule in the weight-training book is dead wrong. Our writer tried his protocol to see ...