Readers muse about memory, magnetic monopoles and more

Your letters and comments on the February 3, 2018 issue of Science News

Memory lane

Inspired by flatworm memory experiments from the 1950s, researchers are on the hunt for the elusive engram — the physical mark that a memory leaves on the brain — Laura Sanders reported in “Somewhere in the brain is a storage device for memories” (SN: 2/3/18, p.