Mark Zuckerberg

The Chan Zuckerberg Initiative just announced one of its biggest investments to date: It is ponying up more than $3 billion to kickstart "Chan Zuckerberg Science," an initiative that plans to bring together multidisciplinary teams of scientists in an effort to prevent, cure or manage "all diseases in our children's lifetime."

The Associated Press

MENLO PARK, Calif. — If you've ever wanted to know the most popular TV shows among your Facebook friends who are doctors, or wanted to see all the photos any of your friends have taken in Paris, the world's biggest online social network has the answer.

CEO Mark Zuckerberg unveiled a new search feature on Tuesday in Facebook's first staged event at its Menlo Park, Calif., headquarters since its May initial public offering.