Gravitational Waves w/ Lawrence Krauss

Cara sits down with theoretical physicist Dr. Lawrence Krauss ("A Universe from Nothing") at Apostacon in Omaha, Nebraska to discuss his cover story in Scientific American magazine. Topics include the recent BICEP2 findings (including what gravitational waves are and what they mean for inflationary theory) as well as why it's important for scientists to communicate their work to the general public. Follow Lawrence: @LKrauss1.