Free to use Physics articles benefit when researchers or enthusiasts share relevant images, such as these from Wikimedia Commons, which anyone can freely use as long as they attribute the original source. Clockwise from top left: the Laser Guide Star facility at Yepun, one of the four unit telescopes of the Very Large Telescope; scanning-electron microscope image of neutrophil engulfing anthrax bacteria; cloud-to-cloud lightning in Zwickau, Germany; tension lines in a plastic protractor under cross-polarized light; schematic diagram of the Soleil synchrotron in France; ferrofluid over a neodymium magnet. Details of Creative Commons licences can be found at https://creativecommons.org/licenses."