Thorium‑229 Nuclear Clocks Demonstrated in Vienna and Beijing; Vienna Shows First Self‑Stabilizing Prototype

Thorium‑229 Nuclear Clocks Demonstrated in Vienna and Beijing; Vienna Shows First Self‑Stabilizing Prototype
You've heard of atomic clocks. Well, that's so 20th century. More precision awaits us with nuclear clocks. And this advance finds a place to hang the clock…inside a calcium fluoride crystal.