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.

The death of the whale at a Miami amusement park just before her planned release highlighted the species’ fraught relationship with humans.

Dry soil in burn scars can lead to roaring earthen rivers that are more powerful than mudslides.

Washington and Oregon sites had leakages 20 times more concentrated than the Clean Air Act limit standards.

Even oil companies not participating in the state’s new carbon auction system are pumping up the cost to the consumer.

Authors of a new book say the 2,500-mile-long ecosystem stores more carbon than other forests — but its lack of an ‘inspiring’ name is keeping it in the dark.