iOS app Android app

Radioactive Carbon

Surprising Suspect In Ancient Tree Ring Mystery

| Posted 03.15.2013 | Science

By Sean Treacy A mysterious burst of charged particles from space hit Earth at some point from 774 to 775 C.E. Scientists know this thanks to a spik...

Ancient Tree Mystery Had Cosmic Cause, Researchers Say

Posted 11.28.2012 | Science

By: Clara Moskowitz Published: 11/28/2012 01:14 PM EST on SPACE.com Something big happened in the year A.D. 774. Scientists studying tree rings fo...