Expert Voices Paul Sutter

A large population of small black holes could have flooded the young cosmos with particles and radiation, creating their own black hole-powered Big Bang, physicists propose in a new paper.

These cosmic rays typically come from the extremely distant universe, from ultrapowerful events such as supernovas and quasars.

Mercury is so strange that astronomers have not been able to explain its properties with simulations of the solar system's formation. But now, researchers have found an important clue.

Finding and studying these strange stars helps us understand the complicated life cycles of normal, more well-behaved stars.

Want to become a published astronomer? All it takes is a spare telescope, or at least a decent internet connection, and plenty of patience.

Einstein toyed with the idea of faster-than-light-particles but found that such particles violated a central rule of the universe: causality.

Some interpretations of quantum mechanics propose that our entire universe is described by a single universal wave function that constantly splits and multiplies.

Lagrange found that the difference between an object's kinetic energy and potential energy unlocked something deeply profound about the universe.

Astronomers hope to use pulsars scattered around the galaxy as a giant gravitational wave detector. But why do we need them, and how do they work?

But could these giant, rocky planets actually sustain the conditions for life? Or is life limited to smaller planets like our own?

A new hypothesis proposes that a large fraction of dark matter may be bound up inside tight balls the size of Neptune — so-called dark matter planets.

New research motivated by string theory suggests possible, and equally strange, fates for evaporating black holes.

Researchers have found a new way to detect some of the most cataclysmic mergers in the universe before they happen.

It sounds like the premise of a bad sci-fi movie: There's some mysterious entity, beyond the boundaries of our galaxy, that is pushing against us with incredible force.

Humans aren't just making Earth warmer, they are making the climate chaotic, a stark new study suggests.

What goes for moving clocks goes for everything else; physics, chemistry and biology all operate at a slower pace in moving frames of reference.

The inflationary epoch that caused our universe to rapidly expand in its earliest moments may be connected to the modern era of dark energy.

Over the decades, the Big Bang theory has taken on some pretty heavy challengers. Let's explore those alternatives and why they didn't work.

Did the graviton, the quantum mechanical force carrier of gravity, flood the cosmos with dark matter before normal matter even had a chance to get started?

It may be possible to build a real, traversable wormhole, but only if our universe has extra dimensions, a team of physicists has found.