Canine performance improves after breakfast and brainless slime mold "remembers" where it's been.
DOGS
Researchers from the University of Helsinki may be on the trail to the answer to an age- old question: why do dogs chase their tails?
New species for 2012 includes sneezing monkey, zebrafish "smell fear", harvestman spider managed to cross the Pacific Ocean 82 million years ago, tomatoes contain more genes than humans, and more.
Dogs That Changed the World: Dogs By Design
Genetics and brain physiology can affect a dog's personality and behavior.
WATCH CLIP