An important aspect of Brownian motion predicted decades ago has been observed for the first time by researchers in Europe. The team has measured how micrometre-sized spheres interact with a ...

Moving pictures: microscope image of a quasicrystal two days after release. The right half has been colour coded. (Courtesy: Po-Yuan Wang and Thomas Mason/Nature) A quasicrystal made from tiny Penrose ...

When astronomers study the rotation of distant galaxies, they immediately come up against a puzzle. The stars are held together by gravity, which prevents them being slung into intergalactic space as ...