This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...

Whether space-time exists should neither be controversial nor even conceptually challenging, given the definitions of “space-time,” “events” and “instants.” The idea that space-time exists is no more ...

Oftentimes, we think of space as an endless, mostly empty vacuum, a silent backdrop where planets, stars, and galaxies play out their dance. We also think of time as something separate, a steady ...

A speech by science adviser Michael Kratsios has attracted attention from people who think he means the U.S. now has time travel technology ...

With almost every company using AI nowadays, integration is no longer a differentiator. But some companies are seeing more revenue growth than others, and how they use AI helps them get there. In ...