How many habitable planets are in our galaxy?

Kepler took a look at 150,000 stars, searching for habitable worlds. Based on…

Ask Ethan #73: The Multiverse and you

Is there another version of you somewhere out there in a parallel Universe?

The status of the Universe: 2015

With the full suite of observations of the Universe now at our disposal, what is the story, contents…

The Most Amazing Hubble Image Ever

Remember the “Pillars of Creation,” the star-forming nursery in the heart of the Eagle Nebula…

When Einstein met H.G. Wells

Encounters in the fourth dimension.

Throwback Thursday: The burden of proof

If a scientific theory can never be “100% proven,” how can we know what’s true?

Ask Ethan #69: Is our Universe escaping us?

As dark energy takes over and distant galaxies accelerate, what are we losing, and…

Ask Ethan #72: The timeline of the Universe

We claim to know the Universe’s history to incredible precision. But is this…

Everything you ever wanted to know about nothing

Ask Ethan #70: Does the Universe have a center?