CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY
Magnetism. Steel filings being picked up with a horseshoe magnet from a pile of copper and steel. Steel is ferromagnetic. This means that when the steel filings are brought close to a magnet, the individual filings will become tiny magnets themselves and will be attracted to the magnet by the force of its magnetic field.
Model release not required. Property release not required.