Brian Greene's excellent series examining string theory and modern physics.

Michio Kaku explores temporal concepts in regard to the planet.

The universe began with a massive expansion, billions and billions of years ago, and it continues to expand with every passing second. The idea that the universe, and man's very existence, began with a ''Big Bang'' is no longer a topic of debate among most scientists--it is essentially taken as fact. How has man come to this ...

Al-Khalili discovers that there might be parallel universes in which different versions of us exist, and finds out that empty space isn’t empty at all, but seething with activity. Part 1 Part 2

In this rare (and delightfully engaging) public appearance, legendary physicist David Deutsch weaves a complex and captivating argument placing the study of physics at the center of our species' survival. Deutsch is author of The Fabric of Reality.

7 of the biggest existential risks possible are examined in this 82 minute special.

BBC Horizons, The Death Star. The most powerful explosions in the universe can be found in Hypernovas.

Documentary on Stephen Hawking, and his ideas which are explored in his book.