Why did they form at that time? Astronomers know from observing distant exploding stars that the size of the universe has ...

Very unusual atomic states are being produced: Ions are created by removing not just one but 20 to 40 electrons from each atom. These 'highly charged ions' play an important role in current research.

For the first time, researchers have pushed electrons to flow so fast they went supersonic, creating a shockwave. The currents of electricity flowing through our devices share a name with river ...