History In The Headlines

Category: Geology

Zircon crystal found in Jack Hills region of Australia (Credit: Jack Valley)

Scientists Confirm Crystal as Oldest Piece of Earth’s Crust

Researchers have confirmed that a tiny gem found in western Australia is the oldest known piece of Earth, dating back some 4.4 billion years.

Recreation of the Permian period (Credit: Getty Images)

Mass Extinction Occurred Much Faster Than Previously Thought

Some 252 million years ago, the planet’s largest mass extinction took place in only around 60,000 years — almost instantaneously, relative to geologic time.

Grand Canyon

How Old is the Grand Canyon? That Depends, Scientists Say

New research published this weekend provides the latest fodder for a long-standing debate over when the majestic Grand Canyon was actually formed.

iStockimages.com

Scientists Solve Supervolcano Mystery

A team of researchers has discovered more information about what causes “supervolcanoes” to erupt, and their findings are unsettling.

Upernavik, Greenland (Credit: Lee Corbett)

Scientists Discover Protective “Ghost Glaciers” in Greenland

A new study finds that so-called “ghost glaciers” – layers of non-erosive glacial ice – have protected Greenland’s ancient landscapes for more than 800,000 years.