New research by the Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe's infancy—the earliest cosmic time yet accessible to humans. Measuring ...

New York Times photographers covered Covid-19 throughout the world. These pictures, and the moments behind them, stayed with them. New York Times photographers covered Covid-19 throughout the world.

Terms of Service and Privacy Policy. A polar bear lounges in a field of pink flowers. An arctic fox skips gingerly as the thaw of spring moves in. And a baby ...