Give me a hammer, and I'd probably end up bashing my thumb with it. When it comes to tool use, dexterity counts.

So when Saturday's Weird Animal Question of the Week heard about the famous nut-crushing monkeys of Brazil, we took the prerogative to ask: "How can these monkeys crack nuts so accurately?"

First off, these bearded capuchins open tough palm nuts by putting them on "anvils," including logs and boulders, and hammering at them, according to research by National Geographic explorer Dorothy Fragaszy of the University of Georgia at Athens.

Fragaszy and colleagues already knew the monkeys are choosy about their nut-cracking tools, for instance by selecting rocks that are heavier than themselves. (Related: "Hercules Monkeys