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Fossils suggest a universe filled with life

Evidence of life processes found in fossils in 3.5-billion-year-old rocks. Scientists say this work suggests life in our universe is widespread.

Scientists explain insights from ancient Tibetan ice core

A short film about an expedition to Tibet’s Guliya Glacier, where scientists drilled a Stone Age ice core going back 600,000 years. Plus a report on what the ice core reveals.

Solstice arrives December 21

December solstice 2017 arrives on December 21 at 16:28 UTC. High summer for the Southern Hemisphere. For the Northern Hemisphere, the return of more sunlight!

Halo and sundogs over Montana

Ski resorts are the best places to see fine halo displays, like this one. Why so beautiful and why so sparkly? Details here.

Solstice tale of two cities

December solstice sunrise comes at the same time for St. Augustine, Florida and New York City. But St. Augustine has an hour more of daylight than New York. Here’s why.

Watch: Grand Canyon cloud inversion

A full cloud inversion followed by a snowstorm over Grand Canyon National Park in this gorgeous new time-lapse.

Study: A third of Asia’s glaciers likely gone by 2100

Meltwater from the glaciers supplies water to 800 million people, so that loss would mean serious consequences for water management, food security, energy production.

Arctic report card 2017

The report shows the warming trend that’s transforming the Arctic region is persisting. The Arctic shows no sign of returning to reliably frozen region of recent past decades, say scientists.

Exposed to wildfire smoke? 5 questions answered

The intense wildfires in southern California are triggering air quality alerts. What do health experts know about how inhaling smoke affects human health?

Darth Vader horseshoe crab

A 245-million-year-old fossil horseshoe crab, recently discovered in Idaho, has been named Vaderlimulus after Star Wars’ Darth Vader. It’s easy to see why.