Add Yahoo as a preferred source to see more of our stories on Google. Earth's rotation is slowing down, and it could be why we have oxygen for life Ever since its formation around 4.5 billion years ...

“Time is what we want most, but use worst,” William Penn once wrote. But for the first time in the annals of modern times, the very fabric of timekeeping is being threatened by no human weakness, but ...

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 ...