Sébastien Clesse

Future detectors will catch the hum from mergers of tiny black holes. New work shows how to distinguish this hum from other sources by its volume and frequency, and peer into the first second after the Big Bang.

Physicists suggest that invisible dark matter is the 'salt' left behind after primordial black holes evaporated. Calculations show that if there were too many such holes, their remnants would have overfilled the cosmos. But black holes weighing about a ton naturally account for the observed amount o