Douglas-fir in Klamath Mountains are in 'decline spiral'

Contractors and area tribes will plant up to 19 billion native seeds as part of the Klamath Dams removal

Why rain on snow in the California mountains worries scientists – and is likely to get worse with climate change

Grizzly bears climb mountains to eat up to 40k moths per day, a mysterious ecological marvel that links alpine food webs with those of the distant plains from which the moths migrate