Fun fact about leap seconds. You can never get rid of them. Let's say you do something reasonable, like put an atomic clock on the moon, or anywhere really, bu

Fun fact about leap seconds. You can never get rid of them. Let's say you do something reasonable, like put an atomic clock on the moon, or anywhere really, but let's stick with the moon. You build your clock, you sync it with the Naval Observatory., and launch it to the moon. 48 years later, who shows up? That's right, the leap second. Your lunar clock is losing 56 microseconds a day due to an insufficiently curvy spacetime (e.g. gravity). https://www.nature.com/articles/d41586-023-00185-z https://www.nature.com/articles/d41586-023-00185-z