Geological history

David B. Williams, a Caucasian man with grey hair stands in front of a very large tree on the shore of Lake Washington at St Edwards Park in Kirkland, Washington. He is wearing a yellow ball cap, olive green shirt and jeans.

The Understory: Discovering Seattle's earthquake history through underwater forests

Bellamy Pailthorp

David B. Williams’ essay "Dead Trees Tell No Lies" explains how geologists read tree rings to unveil details of major earthquakes along the Seattle fault over 1,000 years ago.

Geophysicists announced this week that they have successfully collected key samples from the site of the asteroid strike that likely wiped out the dinosaurs.

Geologists Find Clues In Crater Left By Dinosaur-Killing Asteroid

Geoff Brumfiel

Scientists drilling beneath the Gulf of Mexico have hit the layer deposited when an asteroid the size of Staten Island, N.Y., hit Earth. Samples might contain details from that fateful day.

Environment

Northwest Author Focuses New Book On The Northern Reaches Of Missoula Floods

Anna King

A new book details how a dramatic series of Ice Age Floods transformed the landscape of the inland Northwest.