In 1905, Albert Einstein revolutionized physics by demonstrating that time is not absolute but relative to the observer's ...

For more than a century, physics has treated space and time as the smooth stage on which the universe unfolds, a flexible fabric that bends but never breaks. A new wave of theories is now challenging ...

Many European nations put their clocks back by one hour on Sunday morning as daylight saving time came to an end. In the U.S. and Canada, the time adjustment will be made this coming weekend. But how ...