Why Do Knuckles Go Pop? Researchers May Finally Have The Answer.

There's some disagreement among physiologists about knuckle-cracking and how it produces its characteristic popping sound. Now, Canadian scientists have used MRI scans to watch what happens inside a cracking finger joint in real time – and their observations may have settled this longstanding debate for good. » 4/15/15 12:30pm Wednesday 12:30pm

A Particle Accelerator in Space Could Trigger Artificial Auroras 

Auroras appear according to the whims of nature, not humans, which might just be part of their eerie appeal. But c’mon, it’s the 21st century now. Why are we just waiting around? So here’s a crazy idea unearthed by Mark Zastrow writing in Eos: Let’s a build a particle accelerator to trigger auroras whenever we want. » 4/09/15 12:00am 4/09/15 12:00am