A physicist proposes that the universe is not empty space, but is a viscous fluid, fueling the expansion and contraction we see.

I asked my friend Julie Ménard how Earth formed. She’s a planetary scientist at Washington State University. She told me it started with the Big Bang. That was nearly 14 billion years ago. “The Big ...

Long before telescopes and space travel, ancient civilizations had incredibly creative ideas about what the universe looked like and how it worked. These beliefs shaped culture, religion, and even ...

Physicists suggest that a single, extraordinarily powerful cosmic signal detected on Earth could be linked to the explosive end of a tiny black hole from the early universe. That signal now stands as ...

An experiment to quantify the amount of the universe’s lightest element in Earth’s core suggests that the planet’s water has ...

The discovery is just the latest to come from the asteroid sample, which dates back to the dawn of the solar system.

This video shows the habitable zone around the star HD 20794 (in green) and the trajectory of the three planets in the system. Thirty years after the discovery of the first exoplanet, we detected more ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long-standing debate over how our planet formed. When you purchase through ...

But what if something out there has been sending a steady signal toward Earth for decades — and we’re only now realizing it?