Articles on Geology

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Half Dome in California is constituted from granite, a relatively less dense type of rock. (Shutterstock)

Earth’s rock-solid connections between Canada and Australia contain clues about the origin of life

How the earliest continents formed has been a matter of debate. Analysis of zircons in Canada and Australia suggest that those historical processes are similar to current tectonic movements.
Surface detail of the Tomanowos meteorite, showing cavities produced by dissolution of iron. Eden, Janine and Jim/Wikipedia

Tomanowos, the meteorite that survived mega-floods and human folly

Tomanowos, aka the Willamette Meteorite, may be the world's most interesting rock. Its story includes catastrophic ice age floods, theft of Native American cultural heritage and plenty of human folly.
The ancient landscape at Yarrabubba preserves traces of the world’s oldest known asteroid impact. Shutterstock

We found the world’s oldest asteroid strike in Western Australia. It might have triggered a global thaw

The Yarrabubba asteroid landed 2.2 billion years ago. Around the same time, the icy Earth went through a big thaw.
This started as a mountain range. Bas Meelker/Shutterstock.com

Where does beach sand come from?

Sand may seem abundant when your toes are buried in it, but it's becoming scarce along many coastlines around the world.
A polar bear wandering on melting pack ice in Canada, north of the Arctic Circle, during the summer 2017. Scientists say the last interglacial offers lessons for future sea level rise. Florian Ledoux/The Nature Conservancy

Scientists looked at sea levels 125,000 years in the past. The results are terrifying

Antarctica is no longer the sleeping giant of sea level rise. New research delved into the past and found when the Earth warms, its ice sheets can melt extremely quickly.
The muck that’s been accumulating at the bottom of this lake for 20,000 years is like a climate time capsule. Christopher R. Moore

New evidence that an extraterrestrial collision 12,800 years ago triggered an abrupt climate change for Earth

Why did Earth's climate rapidly cool 12,800 years ago? Evidence is mounting that a comet or asteroid collision is to blame, with new support coming from the bottom of a South Carolina lake.
People have been modifying Earth – as in these rice terraces near Pokhara, Nepal – for millennia. Erle C. Ellis

Surveying archaeologists across the globe reveals deeper and more widespread roots of the human age, the Anthropocene

Hundreds of archaeologists provided on-the-ground data from across the globe, providing a new view of the long and varied history of people transforming Earth's environment.

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