Dr. Gwen Shlichta studies cabbage white butterflies to predict how other organisms may adapt to climate change in the future.

Greenschist gets its tint from minerals compressed under the ocean long ago. Now it caps an entire mountaintop in the North Cascades.

Special thanks to Central Washington University as the original...

On the agenda starting Jan. 8: Spending Washington’s carbon tax, tweaking the cap-and-invest program and taking a stab at utility rebates.

A court struck down one California block on natural-gas appliances. But other cities are finding ways to eliminate fossil fuels despite legal hurdles.

Updates to the Fish and Wildlife plan have accrued public critique and ignited tension from outdoor enthusiasts and tribal representatives.

Sedimentary rock usually builds horizontally. So how does Big Four Mountain in Snohomish County have nearly vertical layers?

Birders, hunters and farmers clash over the lesser snow geese and trumpeter and tundra swans that flock to the land in the colder months.

Geologists believe the formation was created by floods 16,000 years ago, but its ghostly hanging valleys tell a different story.

Towers at Saddle Rock were formed from 44-million-year-old vents of magma hidden deep under the Cascade mountains.

Host and geology professor Nick Zentner explores the Drumheller Channels near Othello — which resemble Southwest deserts — in the Season 5 premiere.