During a visit to Skydive, PA yesterday, I noticed jumpmaster Jim tightening a corset-like weight belt onto his abs. “Jim, your figure looks so refined,” I commented. Jim sneered. “I’ve…
Galileo and the Physics of Skydiving
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How to Create a Closed Timelike Curve
Time along the vertical axis; space along the horizontal…. Voila! And now, how to travel to the past…. Soul Physics is authored by Bryan W. Roberts. Thanks for subscribing. Want…
Soul Physics Meets Cosmic Variance
Sean Carroll of Cosmic Variance made his way to Pittsburgh on Friday. Sean and I managed to solve the problems of the Universe over lunch (more or less), before his…
Visualize the Eversion of a Sphere
It is famously possible to continuously deform a sphere until it’s inside out. You have to imagine the sphere is something like a bubble, which can ‘pass through’ itself. This…
Quantum of Solace
What does quantum mean? With a new Hollywood blockbuster just out, and containing the word “quantum” in the title, it seems we’d better get to the bottom of this. The…