These synthetic cell-like vesicles helped scientists explore the mysteries of our biological clock.

The model revealed that clock stability improves with a higher concentration of proteins, suggesting why organisms might stockpile large quantities of these molecules to keep time reliably.

For more than 100 years, high schools and colleges have relied on the same stalwart tool to measure teaching and learning: the clock. That’s because earning credit toward a diploma or degree typically ...

The U.S. military uses 24-hour military time to avoid confusion between a.m. and p.m. The Navy started using it in 1920, and the Army adopted it in 1942.