Add Yahoo as a preferred source to see more of our stories on Google. A working thorium-229 nuclear clock now tests fundamental constants and sets new limits on ultralight dark matter. (CREDIT: Shimon ...

Michael is a huge fan of JRPGs and fighting games that includes the Persona, Final Fantasy, and Guilty Gear franchises. He has worked as a journalist for a decade and has written for a number of ...

A clock built from thorium-229 has crossed an important line, from a long-discussed concept to a working device. The shift matters because this clock does more than keep time. It can also watch for ...