Two independent research teams have achieved a longstanding goal in physics: building a working nuclear clock. The devices, developed by Beichen Huang and colleagues at Tsinghua University and by Luca ...

We tested Toggl Track, Timely, 7pace, QuickBooks Time, and ActivityWatch to find the best time-tracking tools for freelancers and remote teams.

For the first time, scientists used an atomic nucleus as a clock. The world’s most precise timepieces are made using atoms, specifically their electrons. But clocks based on atomic nuclei — protons ...