The Earth is strangely spinning faster and faster. This phenomenon is all the more surprising since the melting of polar ice tends on the contrary to slow down its rotation speed.
Since 1972, the system has changed: Coordinated Universal Time (UTC), used throughout the world, is now based on data from 450 atomic clocks. The entire mechanism of which is based on the immutable nature of the vibrations of the atom of cesium 133. This article is reserved for subscribers. Use the weekly Newsquiz to test your knowledge of stories you saw on CNN iReport.