London's mayor praised the beavers, who are already having a noticeable impact.

New claims challenge inconsistencies in one of the foundational principles of physics.

The humble bird may help scientists understand how experts learn to see disease.

The study probes how flexible the dreaming body can feel.

San Carlos Lake’s collapse shows how fast stressed reservoirs can turn lethal.

An ancient, massive black hole blinked, revealing a surprisingly mature 'cosmic engine.'

A camera trap confirms a critically endangered species in eastern Nepal.

New experiments suggest humans have a hidden counterclockwise bias.

The first batches could reach passenger flights this month.

Cooling cities is now a public health fight. Barcelona has some lessons.

The new space race is smaller and messier than we anticipated.

It's not The Handmaid's Tale, though that could also come in handy.

The federally commissioned review found no net health benefit from alcohol.

Scientists uncovered a postwar cover-up in a painting by Erich Mercker.

Scientists find fog droplets host growing bacteria that may help clean polluted air.

These squirrels had no quarrels about what they were eating.

The pharmaceutical cabinet of the future might look a lot like a garden.

Scientists found evidence that Chicxulub remained hydrothermally active four times longer than earlier estimates.

Single cells used past nutrient shocks to change how they grew.

Volcanic minerals may help drones absorb radar, but tests haven't confirmed the claim.