Around 1.4 billion years ago, a day on Earth lasted approximately 18.7 hours, according to a study published in the Proceedings of the National Academy of Sciences. And this is at least in part because the Moon was closer and changed the way our planet spun around its axis. Professors Meyers and Malinverno reconstructed the deep history of Earth’s relationship to the Moon. Image credit: Jonny Lindner. Earth’s movement in space is influenced by...
