S1, E2: Professor Al-Khalili discusses the end of the universe. He outlines certain theories, including those of the big crunch, the big rip and the big freeze, that many physicists are suggesting as possible fates for the universe.

S1, E2: Professor Al-Khalili discusses the end of the universe. He outlines certain theories, including those of the big crunch, the big rip and the big freeze, that many physicists are suggesting as possible fates for the universe.