Thank the moon for Earth's lengthening day

Image of Earth taken by the Apollo 8 astronauts on Dec. 22, 1968 as they became the first humans to circumnavigate the moon.

Credit: Courtesy of NASA

"As the moon moves away, the Earth is like a spinning figure skater who slows down as they stretch their arms out," explains Stephen Meyers, professor of geoscience at the University of Wisconsin-Madison and co-author of the study published this week [June 4, 2018] in the Proceedings of the National Academy of Sciences. 

출처: https://www.sciencedaily.com/releases/2018/06/180604151200.htm