Though It Seems Crazy Now, the Neutron Bomb Was Intended to Be Humane

Until the day he died, physicist Samuel Cohen declared that his invention, the neutron bomb, was a "moral" and "sane" weapon that would kill enemy combatants, while sparing civilians and cities. But, despite the support of fans like Ronald Reagan, this weapon of not-as-much mass destruction proved to be a hard sell. » 9/19/14 11:00am Yesterday 11:00am

You Can Now Access All Of Richard Feynman's Physics Lectures For Free

The lectures of Nobel Prize winning physicist Richard Feynman were legendary. Footage of these lectures does exist, but they are most famously preserved in The Feynman Lectures. The three-volume set may be the most popular collection of physics books ever written, and now you can access it online, in its entirety, for… » 8/30/14 10:30am 8/30/14 10:30am

Physicists Have A Simple Answer For How Egyptians Built The Pyramids

The Great Pyramid of Giza is the last of the ancient world's "seven wonders." The 4,500-year-old structure was constructed from 2.4 million limestone blocks, most weighing around 2.5 tons. Today we're still debating how the Egyptians managed to move these blocks from local quarries. Now scientists have a new… » 8/27/14 3:20pm 8/27/14 3:20pm