Maybe Dark Matter is Warm, Not Cold

A new study by an international team of scientists considers the possibility that dark matter might be "warm" instead of…

5 years ago

Gravitational Astronomy? How Detecting Gravitational Waves Changes Everything

We’ve now had multiple detections of gravitational waves, opening up a whole new field: gravitational astronomy. We talk about the…

7 years ago

How Do We Know the Universe is Flat? Discovering the Topology of the Universe

Cosmologists tell us that the Universe is flat. It sure feels like 3-dimensions. What does this even mean, and how…

7 years ago

What Was Cosmic Inflation? The Quest to Understand the Earliest Universe

The Big Bang was a tremendous theory, but it had a few problems. In 1980 Alan Guth developed the revolutionary…

7 years ago

When Was the First Light in the Universe?

When was the first time that the Universe cooled down enough that light could finally move around?

7 years ago

Big Bang Theory: Evolution of Our Universe

The Big Bang Theory explains how the Universe has evolved over last 13.8 billion years, starting from a singularity to…

8 years ago

New Cosmological Theory Goes Inflation-Free

The Cosmic Microwave Background (CMB) radiation is one of the greatest discoveries of modern cosmology. Astrophysicist George Smoot once likened…

9 years ago

What is the Oscillating Universe Theory?

The Oscillating Universe Theory is a cosmological model that combines both the Big Bang and the Big Crunch as part…

15 years ago