A look at current estimates of the number of galaxies in the observable universe and how scientists arrive at these figures.

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

One of the remarkable scientific discoveries of the past several decades is that the universe and earth appear fine-tuned for ...

Here’s what you’ll learn when you read this story… A mind-bending theory called quantum immortality suggests that your consciousness shifts to parallel universes after you die. The theory is an ...

The collectibles include familiar characters from the franchise, like Bowser, Yoshi and Princess Peach ...

Modern physics suggests that the universe may contain far more dimensions than the three we experience every day. Some theories point to as many as 11 dimensions, hidden from direct observation but ...

A black patch of sky looks empty until you stop taking it for granted. That is the starting point of a theory from Professor ...

The Eberly Telescope Dark Energy Experiment (HETDEX) has discovered tens of thousands of gigantic hydrogen gas halos, called ...

The basic shape that best describes our expanding universe is also the hardest shape for physicists to understand.

Other scientists have investigated the idea of a hidden structure further. David Bohm, a 20th-century physicist, built a ...

A new experiment with momentum-entangled helium atoms could help unite quantum mechanics and general relativity.

Dark matter is some kind of substance that has gravity—it holds galaxies together—yet cannot be directly seen with any ...