Physics

Seventeen natural sites possessing ancient nuclear reactions have now been found: evidence of Earth's first nuclear reactor.

From here to the limits of what we can see, here's a breathtaking illustrated logarithmic view of the Universe.

A wormhole is like a tunnel between two distant points in our universe that cuts the travel time from one point to the other.

Although most people can name Einstein's most famous equation, E = mc², very few people can explain what it means.

There are between 6 and 20 trillion galaxies out there. Carl Sagan's "billions and billions" was far too low of a guess.

When we measure it, we find that our Universe really is flat. Here's what we can learn from that, and why it matters so much.

Today, the fastest-ever nova to fall off has been discovered, and even faster ones may be out there. What comes next?

The mega drive might provide enough thrust for a spacecraft to travel near the speed of light using only electricity, says one physicist.

An analysis of the gravitational wave data from black hole mergers show that the event horizon area, and entropy, always increases.

Why some people are considered geniuses while other equally impressive people are not seems largely arbitrary.