Michio Kaku - theoretical physicist and futurist

Sci-Fi Science - series website (Science Channel)

Discovery Channel Sci-Fi Zone - the pioneers of science fiction

Wonders of the Universe - Prof. Brian Cox

Stephen Hawking - renowned physicist's official website

Into the Universe with Stephen Hawking - Discovery Channel series (2010)

Stephen Hawking's Universe - PBS companion website (1997)

Carl Sagan's Cosmos

The Tesla Museum

PBS Master of Lightning - life and inventions of Nikola Tesla

Michio Kaku: Is Time Travel Possible?