Morning Overview on MSN

A thorium nuclear clock ran itself for 24 hours, drifting a second every 30 million years

A thorium-229 nuclear clock built at TU Wien in Vienna has a fractional precision of about one part in 10 to the 15th power, ...
Ars Technica

How to accomplish 24-hour clock on lock/login screen in macOS?

I know I've seen the 12-hour clock on the lock screen before, but right now (running 27.0) I can't reproduce it on my M1 Max MBP. On a fresh restart, it's displaying 24-hour time. On a logout, it ...