As scientists wait for the asteroid to reappear, its revised trajectory is now drawing attention to another possible target: ...

The solar system floats inside a vast, million-degree hot bubble—an invisible cocoon of thin gas that glows in X-ray light. Known as the Local Hot Bubble (LHB), this low-density cavity stretches more ...

Looking up at the night sky, it may seem our cosmic neighborhood is packed full of planets, stars and galaxies. But ...

Bear Grylls' company, BecomingX, is hosting the world’s deepest marathon in the tunnels of a Swedish zinc mine called ...

California’s natural wonders are legendary, but tucked away in the Los Padres National Forest near Ojai lies a hiking paradise that feels like stepping into another world entirely. The Piedra Blanca ...

In the Jungfrau-Aletsch-Bietschhorn region, the Jungfrau Railway is a breathtaking journey for your bucket list. New: Eiger ...

Every year, ultrarunners sign up to compete in a brutal race that stretches 135 miles across Death Valley in the high heat of summer. Because of its harsh conditions, the Badwater 135 is perhaps the ...

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