The speed of light — a brisk 299,792 kilometers per second — is one of the universe’s most fundamental (and scientifically useful) constants.
But relatively little attention has been paid to the speed of light’s nefarious twin, dark.
This week, as part of its excellent Giz Asks series, Gizmodo looked to a number of physicists and experts — including Neil DeGrasse Tyson, George Musser, and Perimeter’s own Niayesh Afshordi — with a seemingly simple question: what’s the speed of dark?
“I believe the speed of dark is infinite!” says Afshordi.
Read his explanation and the others in the full article on Gizmodo.