The original version of this story appeared in Quanta Magazine. Imagine standing on a railway platform watching a trolley go past. A girl on the trolley drops a bright red ball. To her, the ball falls ...

Motion is the fundamental condition of all manifest reality. What we often perceive as rest is merely inertia, an appearance ...

"It would be amazing if a simple rotation of the universe was the origin of dark energy." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. What is ...