Add Yahoo as a preferred source to see more of our stories on Google. Earth’s rotation has been slowing over time, but not uniformly. Instead, it decelerates in a staircase pattern. At some points, it ...

As spring brings the world back into bloom, Earth Day gives us a quiet moment to remember just how special our planet is. Earth Day is celebrated annually on April 22, showcasing the beauty and ...

April 22 is Earth Day, the annual salute to the planet and its environment. "On April 22, 1970, 20 million Americans...took to streets, college campuses and hundreds of cities to protest environmental ...

Earth takes 24 hours to complete a full rotation in a standard day, equal to exactly 86,400 seconds. July 9 was the first of three days in which a millisecond or more could be shaved off the clock on ...