Einstein's Cosmic Speed Limit Still Reigns, for Now

01/08/2013 07:00

by Clara Moskowitz, Assistant Managing Editor   |   July 29, 2013 04:41pm ET

The speed of light is considered to be the ultimate cosmic speed limit, thanks to Einstein's special theory of relativity. But physicists aren't content to assume this limit without testing it.

That's where a new experiment with electrons comes in.  [Read more] ...