Expert Voices Paul Sutter

A new theory suggests dark matter may have come from quantum bags that got squished together in the early universe.

Certain weird gravity conditions would make it possible to travel through a wormhole and back.

What would a universe flooded with primordial black holes look like?

With its frigid temperatures, remoteness from the sun and general dustiness, changing Mars to be more Earth-like is more challenging than it seems (and it already seems pretty tough).

Theories that attempt to resolve the so-called black hole information paradox predict that black holes are much more complicated than general relativity suggests.

The supermassive black hole in the center of our galaxy may not be a black hole at all, but rather a fluffy ball of dark matter called darkinos.

For decades, cosmologists have wondered if the large-scale structure of the universe is a fractal — that is, if it looks the same no matter how large the scale.

Physicists have long been unable to describe what happened just after the Big Bang when a teensy blip ballooned into the universe, a process called inflation. We may know why.

Believe it or not, physicists are attempting to understand the universe when it was only a handful of seconds old.