Charles Darwin worried that the fossil record looked strangely abrupt, with complex animals appearing in a geological instant instead of gradually unfolding over deep time. A new idea about how ...

LET’S SEE WHAT QUESTIONS SHE’S ANSWERING THIS WEEK. HEY, IN THIS WEEK’S ASK CARRIE, WE ARE ANSWERING THIS QUESTION. SO WHAT IS THE HISTORY OF THE COLGATE CLOCK AND WHY IS IT UP AND RUNNING AGAIN? WELL ...

UNWINDS THE STORY FOR US. THIS IS AN ORIGINAL CLOCK HAND, AND THIS HAS GOT A COUNTERWEIGHT ON THE BACK. THE HANDS HOLDING THIS HAND OF TIME BELONG TO CLOCK EXPERT CHUCK ROSER. SOME OF THEM ARE INTERM.

Graphic illustrating the difference in energy between running a quantum clock (left: a single electron hopping between two nanoscale regions) and reading the ticks of the clock (right). The energy ...