More than 100 scientists collected samples from rivers in 40 countries to create a map showing how humans are altering waterways, causing them to emit more carbon dioxide into the atmosphere and contribute to climate change.

From fake images of war to celebrity hoaxes, AI technology has spawned new forms of reality-warping misinformation online. New analysis co-authored by Google researchers shows just how quickly the problem has grown.

Elon Musks startup Neuralink is pitched as a brain implant that will let people control computers and other devices using their thoughts. Turning brain signals into computer inputs means transmitting a lot of data very quickly. Now, the company is seeking a new algorithm that can transmit that data in a smaller package through a public challenge.