Now’ doesn’t exist in a quantum sense. Neither does ‘then’. So to measure time passing, scientists have come up with a new ...

Long before paper, pens, or signatures, people used carved stones to prove who they were. These ancient artifacts, called cylinder seals, have been found by the thousands across Mesopotamia and ...

Almost anybody can do 100 miles. If you can run 10 miles, you can run 100 miles. But you have to be persistent, says Roche.

By simplifying the numbers I tracked midrace, I felt less anxious, more focused, and actually enjoyed running more.

Optical lattice clocks are emerging timekeeping devices based on tens of thousands of ultracold atoms trapped in an optical ...

What time does the clock show? Show puzzle solution Label the lower hand pointing left A, the higher one pointing left C, and ...