Gravity has become an unlikely viral villain, blamed for an imagined global blackout in which the planet briefly lets go of ...

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

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.

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 ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at ...

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...

"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time literally no longer make sense." When you purchase through links on our site, we ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

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 ...

"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.

How many electrons are there in the Universe? One bold theory suggests that there could only be one, although this theory has ...