Interesting. For most of the length of history, Earth’s rotation has been slowing down due to tidal deceleration. But in the last century, Earth’s rotation has been speeding up due to mantle effects. It is not anticipated that this will last for too long, but if a negative leap second does happen because of this, that will really drive our tech infrastructure out of whack.
20190803/https://www.ucolick.org/~sla/leapsecs/dutc.html
20190803/https://www.theatlantic.com/science/archive/2019/07/we-need-new-science-progress/594946/?utm_term=2019-07-30T17%3A33%3A42&utm_medium=social&utm_source=twitter&utm_campaign=the-atlantic&utm_content=edit-promo
20190803/https://towardsdatascience.com/next-gen-adaptive-neural-systems-c71615eae2a
20190803/https://www.marieclaire.com/career-advice/a27616322/uber-self-driving-car/