Chimpanzees observed making spears, using them to skewer bush babies.

[slash196]

You think animals aren't smart? I'll tell you one thing, living in the wild is a LOT harder than living in civilization. You're either smart or you're dead.

 

[Rainsford]

Originally posted by: Elfear
Interesting but I think evolution would only be one of many theories explaining the behaviour.

Comments that this is proof of evolution are missing the point. No single data point can prove (or disprove) evolution, the point is that this narrows the gap of the famous "missing link" long used as a counter-argument to the evolutionary link between humans and chimps. If chimps have the ability to make and use tools, perhaps the evolutionary gap is less than we previously thought, making the evolutionary argument more plausible.