On second thought: Scientist want to make this unit of time more precisePlay
One thousand one. One thousand two. One thousand three. We all know how long a second is — at least approximately.
But did you know that we rely on the element Cesium to officially measure this unit of time and that we're due for an update?
Here & Now's Celeste Headlee speaks about this with Elizabeth Donley, chief of the time and frequency division of the National Institute of Standards and Technology in Boulder, Colorado.
This segment aired on June 8, 2022.