Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...

The energy requirements for manipulating spacetime on a scale necessary for time travel are astronomical. Time travel remains a tantalising concept, captivating the human imagination and stirring ...

Physicists have experimentally reversed electromagnetic waves in time, confirming a theoretical prediction that has stood for ...

Contemporary physics has learned to describe the universe with unprecedented precision. Yet when it tries to say what time is, it stumbles again and ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Start with a Black Hole … The physical possibility of time traveL ...

The laws of physics imply that the passage of time is an illusion. To avoid this conclusion, we might have to rethink the reality of infinitely precise numbers. Strangely, although we feel as if we ...

IMAGINE standing outside the universe. Not just outside space, but outside time too. From this spectacular vantage point, you gaze down upon the universe. At one end you see its beginning: the big ...

He was a gentleman who helped create the world’s most deadly weapon; a humble man who collected as many honors as almost any man of his time. Before he died of a heart attack last week at 77, Danish ...