In a provocative new paper, a group of UCLA biologists say that the leading theory for how memory is stored in the brain needs a rethink. But is it really time to throw out the textbooks? In their study, published in Elife, authors Shanping Chen, Diancai Cai, and colleagues examined the formation of synapses, connections between neurons. They used neurons from Aplysia, a sea slug whose rather simple nervous system is popular among learning and memory neuroscientists.