A species of amoeba seems to possess a rudimentary form of memory that keeps it from walking around in circles.
Some microbes search for food by following its smell. In the absence of chemical clues, however, such creatures have appeared to wander randomly. But random walks aren’t a very efficient foraging strategy , since they can bring the microbe back to the same place again and again.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.