Take a photo of a mystery critter using your cellphone, and iNaturalist will try to tell you what it is.
Large initiatives are underway to pinpoint the next big viral threats—but some virologists believe the task is too hard.
... and its possible resurrection
The president jumps the shark.
Long-banned pollutants called PCBs could wipe out many orca groups within the next century.
A shocking sequence shows the huge mammals scaling steep cliffs, then falling to their death.
A great mud boom 400 million years ago changed features such as the shape of rivers and the planet’s biodiversity.
Twenty-five of the endangered rodents are living on top of a multibillion-dollar Chilean gold reserve. Miners are going to great lengths to relocate them.
They lure their prey with the promise of sex and then kill them cold.
Yes, they can.