A study has found that climate change-driven sea level rise is slowing Earth's rotation at a rate not seen in 3.6 million years. This is due to the increasing length of days by 1.33 milliseconds per century, according to the study. The moon's influence on Earth increases Earth's day length by about 2.4 milliseconds a century, but this rate is offset by an effect called glacial isostatic adjustment, which reduces the planet's crust after the retreat of the ice sheets. The study also found that under a future warming scenario, the day could lengthen by 2.62 milliseconds per cent by 2080. The findings have implications for instruments that require precise knowledge of Earth's rotating rate, such as spacecraft instruments, and computing applications.