To most of us, time feels as solid as the phone alarm that drags us out of bed or the calendar that fills up faster than we would like. Yet a growing group of physicists and philosophers now argue ...

Recent James Webb Space Telescope data confirms a decade-old theory that the universe's earliest supermassive black holes ...

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

We experience the flow of time because it’s a natural outcome of the basic laws of physics. But we may need to build a whole ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of ...

Albert Einstein won the 1921 Nobel Prize in Physics, but not for relativity—the theory that made him famous. This article ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Two cutting-edge atomic clocks — the most accurate ever ...

Fragments of energy may be the fundamental building blocks of the universe. The theory combines the ideas of particles and waves into a concentration of energy that flows throughout space and time.

A new software package detailed by Chinese scientists promises to tell what time it is on the moon, accounting for effects of relativity.

"This is a real gift for physicists as we confirm predictions made more than a century ago." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Two blind spots torture physicists: the birth of the universe and the center of a black hole. The former may feel like a moment in time and the latter a point in space, but in both cases the normally ...