How can a horde of active robots be automatically brought to a standstill? By arresting their dynamics in a self-sustained way. This phenomenon was discovered by physicists at Heinrich Heine ...

The region of space dominated by Earth's magnetic field is the magnetosphere. Observations have shown that, within this ...

Lightning may look like a sudden burst from the clouds, but its true origin lies in an invisible storm of cosmic rays, X-rays, and high-energy electrons. A breakthrough study led by Penn State ...