What Happened to Hawking’s Theory of Everything?
For more than 30 years, Stephen Hawking pursued the ultimate Theory of Everything. Then, abruptly in 2009, he announced that there is no such thing, and he was OK with that.
Oppenheimer’s Biggest Blunder: Frozen Stars
One of J. Robert Oppenheimer’s greatest theoretical triumphs was also his biggest blunder.
The One Orbital Effect You’ve Never Heard of
It takes relativity to explain planetary orbits, but there’s one relativistic effect you’ve probably never heard of.
The Black Hole in Your Kitchen Sink, Part 3 -Gravitational Lensing
Gravitational lensing is one hallmark of Einstein’s version of gravity know as relativity. You can do your own gravitational lensing experiments in the water flowing in your kitchen sink.