For decades now, scientists have believed that working memory, a form of short term memory, can be accessed only through the sustained firing of neurons. Until recently, the scientific consensus has been that once our brain is no longer actively maintaining these memories, the information is irretrievably lost. A new technique called transcranial magnetic stimulation (TMS) uses focused electromagnetic fields in order to reactivate neurons and retrieve these memories. Read more about it at the Harvard Science in the News Blog.