When a group of neighborhood kids have a water fight, the amassed weaponry is truly astounding. An aquatic arms race has resulted in Super Soaker water guns that can blast streams of water fifty feet across the yard.
That makes chimps, along with orangutans and humans, the only species that appear to recognize themselves in the mirror.
As it turns out, all that so-called wisdom about stretching before and after your work out to prevent injury is just a myth.