The Hubble tension is one of the biggest mysteries in cosmology. It centers around the Hubble constant—the measurement of how fast our universe is expanding—which comes out as two different numbers ...

This is a classic introductory physics problem. Basically, you have a cart on a frictionless track (call this m 1) with a string that runs over a pulley to another mass hanging below (call this m 2).

So-called Hubble Tension could be hinting at new physics. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A major discrepancy between different ...

Too many bright early galaxies giving you a headache? Try new "early dark energy" for fast relief! When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works ...