The study is the first to show that monkeys, like humans, not only react to visual information, but also that they can use it to reason about the behavior of others.
The findings suggest that certain human cognition skills are not as rare as once thought. They also indicate that the ability to reason did not evolve in humans. Instead, the brainy trait probably passed down to us from our ape ancestors.
Cheeky semi-psychic bastards!
Actually, this doesn't stike me as all that earth-shattering. I mean, dogs and horses (aka: "Big dogs") can interpret very subtle visual cues, too.
[FYI: Title ref]