Researchers have unveiled a new model for the universe’s birth that replaces cosmic inflation with gravitational waves as the ...

On human timescales, the universe may as well be eternal. It’ll be here long after our species and our planet are gone, but ...

When discussing the scale of the universe, we’re immediately faced with an intriguing question: are we tiny beings, or is the ...

If recent discoveries that dark energy is evolving hold any water, our Universe will collapse under its own gravity on a ...

“The cosmos is also within us, we're made of star-stuff. We are a way for the cosmos to know itself.” - Carl Sagan Compared to the Sun, how big is the Earth? What is a scale model and how does it help ...

This NASA/ESA Hubble Space Telescope image features the spiral galaxy Messier 77, also known as the Squid Galaxy. CREDIT: ESA/Hubble & NASA, L. C. Ho, D. Thilker. Get the Popular Science daily ...

Before the cosmos lit up with stars and galaxies, the universe passed through a dark, silent era. But new findings suggest ...

Ordinary matter – basically, anything other than dark matter – makes up about 15% of all matter. But half of it has long been missing. Powerful bursts of radio waves emanating from 69 locations in the ...

The early universe experienced a phase of rapid expansion, known as inflation. For decades, cosmologists assumed that this expansion was powered by a new entity in the universe, known as the inflaton.

A faint radio "whisper" from ancient hydrogen reveals the universe was heating up long before it filled with starlight.

Pulsars could be helping scientists distinguish between gravitational waves caused by supermassive black hole collisions and ...

The early universe was already warm before reionization, revealing that the first stars did not flicker on in an icy cosmos.