Massachusetts Institute of Technology astrophysics professor Nergis Mavalvala, center, takes questions from members of the media with MIT physics professor Matthew Evans, left, and research scientist Erik Katsavounidis during a presentation on the discovery Thursday of gravitational waves.
Massachusetts Institute of Technology astrophysics professor Nergis Mavalvala, center, takes questions from members of the media with MIT physics professor Matthew Evans, left, and research scientist Erik Katsavounidis during a presentation on the discovery Thursday of gravitational waves. Steven Senne AP
Massachusetts Institute of Technology astrophysics professor Nergis Mavalvala, center, takes questions from members of the media with MIT physics professor Matthew Evans, left, and research scientist Erik Katsavounidis during a presentation on the discovery Thursday of gravitational waves. Steven Senne AP

Physicists detect gravitational waves from violent black-hole merger

February 11, 2016 05:02 PM

UPDATED February 11, 2016 05:03 PM

More Videos

  • Chester County volunteers pitch in to serve special Thanksgiving week meal

    Bobbie Brown, the founder and organizer of an annual Thanksgiving week meal in Chester County, led a group of family and other volunteers Tuesday in hosting the 30th annual event for more than 100 special needs adults. The event was held at Cedar Grove Baptist Church. The diners are clients of the Chester County Board of Disabilities and Chester Department of Social Services, as well as others.