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Need To Know | Fri., Feb. 18, 2011 | PBS

Duration: 53:36 (Full Program)
Program: Need to Know #141
Broadcast Date: Feb. 18, 2011

Physicist Brian Greene explains the science behind the theory of multiple universes. We provide an update to our previous reports on fracking. Alison Stewart speaks with Michael Wahid Hanna to discuss what may come of Egypt's new political structure. Producer Mona Iskander provides a personal essay on her experience watching the Egypt protests unfold.

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Post Date: February 18, 2011