A veteran guide focuses on pre-climb training and the Tibetan side of the mountain.
Deepwater drilling is increasing in the Gulf. Oil companies say it’s safer now, but critics say spills are inevitable.
A surge in hydroelectric power could displace the iconic region’s indigenous peoples and resources.
On the 150th anniversary of that trip, historian Adam Goodheart reflects on the rail splitter’s special connection to railroads.
California Fish and Wildlife is helping endangered bighorn sheep reclaim their old range—by lifting them over the humans and mountain lions.
Unlike ordinary particles, dark matter seems to feel only gravity, not the other forces of nature. But new observations show that might not be true after all
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