Ever since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing down, and its days have gotten progressively longer as a result. While Earth's slowdown is not ...

Earth's rotation is randomly speeding up, and nobody is quite sure why. These speedups, which have occurred several times over the last few years, haven't had any effect on daily life, but they also ...

Add Yahoo as a preferred source to see more of our stories on Google. California is set to experience one of its shortest days on record — and, no, it’s not because summer is winding down in the ...