tonight the theoretical fisist lawrence krauss joins us to talk about the march and his new book, "the greatest story ever told - so far," why are we here. then we will shift gears and speak with actor, director and writer dax shepard about his reboot of the cop drama "chips." we are glad you joined us. all of that in just a moment. ♪ ♪ ♪ >>> and by contributions to your pbs station from viewers like you. ♪ >> thank you. ♪ ♪ >>> theoretical physicist lawrence krauss spent his life discovering the outer reaches of the cosmos and the tiniest particles perceived. he has written nine books. latest text is titled "the greatest story ever told - so far", why are we here? professor krauss, good to have you back on the program. >> great to be back with you. >> let me start by talking about the mari referenced a while ago. i'm not surprised there will be a march for science. >> yes. >> tell me more about it. >> i think the idea is people are -- i hope the idea is people are really concerned about the fact that this administration, as some administrations have done, they're not basing their publ

tonight the theoretical fisist lawrence krauss joins us to talk about the march and his new book, "the with actor, director and writer dax shepard about his reboot of the cop drama "chips." we are glad you joined us. all of that in just a moment. ♪ ♪