Scientists warn that an unstable mountain slope above Barry Arm could collapse, triggering a massive landslide.
The historic observatory houses around 50 buildings and several telescopes used by leading astronomers.
"The harsh and remote environment of mountainous frontier regions historically attracted non-conformist settlers strongly motivated by a sense of freedom," said researcher Friedrich Götz.
Residents of the city of Jalandhar in Punjab have been posting images on social media showing the snow-capped peaks of the the Dhauladhar mountain range.
The boy was walking along a path covered with ice when he slipped and fell in Platte Cove in the Catskill Mountains in upstate New York.
A profile on Wanda Rutkiewicz, the third woman to reach Everest's summit and one of the most accomplished mountaineers in history.
Experts are optimistic national parks could see a repeat of the 2017 superbloom which could be seen from space.
Some 5,000 feet beneath the surface of the sea lies a world of weird and wonderful species.
Scientists hit the road with a high-precision clock hooked up to a trailer.
"What we've done is mapped out where it's a peanut butter sandwich and where it's a jelly sandwich."
Double the snowfall in Alaska has resulted from warmer oceans.
At a dozen popular ski resorts and mountains in the northeastern U.S., only 14 percent of trails are open.