Browse Physics

Spectra from distant quasars imply that a fundamental physical constant may have been increasing slightly over the past six billion years.

Magnetic field lines do not like to bend, so when the space around them becomes warped by large masses, the fields fight back.

Cosmologists wonder why we happen to live in the era when the three major components of the Universe exist in similar quantities. One explanation involves only the most basic parameters from high energy physics.

A new theory proposes that dark matter consists of particles so light that their quantum, wavelike nature dominates.

WIMPs, particles that may solve the dark matter mystery, have still not been detected by the most sensitive search yet.

New estimates of extragalactic magnetic fields may resolve the long-standing mystery regarding the sources of the highest energy cosmic rays.

Astronomers say the Universe’s expansion has been accelerating recently. A new model for repulsive ‘dark energy’ may help explain the acceleration in a more natural way than other models.

Cosmologists have used recent data to constrain the type of ‘dark energy’ that may fill all of space.