At Google DeepMind, researchers are chasing what's called artificial general intelligence: a silicon intellect as versatile as a human's, but with superhuman speed and knowledge.
Monarchs traveled to a remote part of Mexico, a journey they've made for thousands of years, and wintered there. Now tens of millions of the butterflies are on an epic aerial journey back north.
It was just five days before Easter 2019 that a devastating fire swept through the Cathedral of Notre Dame. After extensive repairs, Easter Sunday mass was celebrated at the great church again today.
