Physicists at the University of Kaiserslautern in Germany have observed how individual atoms diffuse through a gas for the first time, and how individual collisions between particles affect diffusion.

Brownian diffusion is a ubiquitous mechanism of transport for ions, molecules and submicrometre particles. It can limit the rate of chemical reactions as well as determine the efficiency of ...

A new study suggests that dark matter may consist of particles with different masses. By introducing a two-component self-interacting dark matter model, the researchers show that both the low-density ...

Dark matter keeps getting blamed for the universe’s big patterns while staying stubbornly out of reach. You cannot see it, ...

What is the Stokes-Einstein Equation? The Stokes-Einstein equation is a fundamental relation in physics that describes the diffusion of spherical particles through a fluid with low Reynolds number. It ...

It is impossible for a telescope to image and far from being completely understood, yet dark matter is everywhere. The deepest mysteries about dark matter relate to its nature and behavior. The ...