PopSci: "In order to create a workable model of a human mental disorder like depression, anxiety or schizophrenia, rats are often genetically manipulated or have their nerve system surgically altered. Sometimes they are forced to swim for long periods of time. Now, researchers at Waseda University in Tokyo have created a new method: Let a robotic rat terrorize the rats into depression."
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects