New documentary 'A Compassionate Spy' reveals the crisis of conscience that led Manhattan Project physicist Ted Hall to spy for the Soviets, and how his spouse Joan kept his secret

Scientists thought the chances of an A-bomb destroying Earth were 'near zero.' We know now that climate change could obliterate humanity, but we continue along our destructive path

New film 'Adventures of a Mathematician' follows Stan Ulam, who lost nearly his entire family in the Holocaust, as he helps his new homeland's nuclear efforts during and after WWII

After seven decades, identity of mole finally revealed in a tangled story of cat-and-mouse espionage involving Jewish agents and double-agents working for the Communists and FBI