ANIMALS - New discovery on animal memory opens doors to research on memory impairment diseases

If you ask a rat whether it knows how it came to acquire a certain coveted piece of chocolate, Indiana University neuroscientists conclude, the answer is a resounding, "Yes." A study newly published in the journal Current Biology offers the first evidence of source memory in a nonhuman animal.

http://phys.org/news/2013-02-discovery-animal-memory-doors-impairment.