Evolution in action detected in Darwin's finches

The most characteristic feature of Darwin's finches is the diversification of beak morphology that has allowed these species to expand their utilization of food resources in the Galápagos archipelago. A team of scientists ...

Sao Paulo drought issue for global concern

He cast his rod happily here for 30 years—but where a river once teemed with fish, Brazilian fisherman Ernane da Silva these days stares out over a valley of weeds and bone dry, sun-parched land.

An ominous mudslide on a depleted Mount Shasta

Jonathan Dove was patrolling Mount Shasta on a clear, warm afternoon when a group of backpackers asked him if Mud Creek Canyon on the Northern California peak always flowed so heavily.

Microbes help plants survive in severe drought

With California in its fifth year of severe drought and many western states experiencing another year of unusually dry conditions, plants are stressed.

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