Science

Residents of these islands have waged many campaigns against disease-carrying mosquitoes. But there's still not much agreement at public meetings about how the mosquitoes should be controlled.

Grizzly bears in Yellowstone may soon lose protection from the federal government. The U.S. Fish and Wildlife Service proposed taking the bears off the endangered species list, saying the population has recovered to a self-sustaining number. Opponents dispute that, in part because they say federal biologists aren't sufficiently accounting for climate change threatening their food sources.

NIH Director Francis Collins has stopped research at two leading labs for now. But an independent board of experts wants even more oversight to ensure that patient safety is the top priority.

No wonder we don't feel rested after a first night in a new place: Half of our brain has stayed alert while the other half enjoyed deeper sleep, a study finds. We really have been half-asleep.

The two nations topping the world in greenhouse gas emissions agreed at the Paris talks to cut way back. But critics have stalled a key part of the U.S. plan, and China's good start may be fragile.