The grandfather paradox is just one of the thorny logical problems that arise with the concept of time travel. But one physicist says he has resolved them.

"The Double-Edged Sword of Storytelling Learn how storytelling can be both powerful and dangerous, and how it shapes our perception of reality." Watch: Moment Hamas releases four Israeli ...

Air conditioning and refrigeration consume about 20% of global electricity, relying on century-old vapor-compression ...

As entropy increases, eventually there’s no more order to make chaos from, and ultimately interesting things will stop happening – a long, slow “heat death”. Receive a weekly dose of ...

The continuous increase in entropy is a law of nature. Due to entropy’s relationship with possible states, it is also related to randomness. Additionally, it is associated with heat loss. The second ...

A mix of equal portions of metal ion precursors on a film of graphene oxide (left) are subjected to a photoflash from a Xenon lamp. Heated to more than 1,000 K, the precursors transform into ...

The famous second law of thermodynamics says that the world gets more and more disordered when random chance is at play. Or, to put it more precisely: that entropy ...