Ultralight dark matter

Innovations Scientists demonstrate sustained operation of the world’s first self-regulating nuclear clock

Thorium nuclei now guide a working clock’s laser through automatic feedback, though the prototype still trails leading atomic clocks.

Innovations NIST scientists invent a quantum crystal detector to hunt for dark matter Joseph Shavit

Innovations Physicists use thorium-229 to power the world’s first working nuclear clock Joshua Shavit