Storage and cooling of thorium ions has also been achieved already. It's only a matter of time before a clock is built using such an ion-trap setup (and a matte

Storage and cooling of thorium ions has also been achieved already. It's only a matter of time before a clock is built using such an ion-trap setup (and a matter of significantly more time until auch a clock can be used in real-world applications). The article is talking about avoiding this but I believe the first thorium clock will likely be an ion trap. A nice website collecting information about this is https://thoriumclock.eu https://thoriumclock.eu