The opt-in AI feature lets you use Copilot like an always-there web assistant.

For the first time in history, we can explore the universe through a rich blend of senses—seeing, touching, and hearing ...

From a cubic millimeter of brain tissue, scientists have constructed a precise, 3D map of the activity in a mouse’s brain, detailing 84,000 neurons and more than 500 million synapses.

Scientists tested crows on their ability to recognize “geometric regularity,” a skill previously assumed to be unique to ...