https://www.theregister.co.uk/2017/08/15/photon_scattering_puts_a_shine_on_cern_atlas_boffins_day/

Large Hadron Collider boffins in charge of the ATLAS experiment reckon they've seen photons interacting at the quantum level for the first time.

This isn't something that happens at everyday energies: if, for example, you shine two beams through each other in a dark room, you'll see two spots on the wall.