Bill Maher to grads: ‘Ask what’s true’

In his speech at UC Berkeley’s winter commencement on Dec. 20, comedian Bill Maher urged students to help save the earth, to be free thinkers and to “make a difference.”  (Videos by Roxanne Makasdjian and Phil Ebiner)

Watch a Maher excerpt using a quote from famed mathematician Stephen Hawking:

Watch Bill Maher’s full commencement speech:

Related article: Read more coverage of Berkeley’s winter commencement and Maher’s appearance.