Study pinpoints when bow and arrow came to North America

Radiocarbon results suggest a single origin and rapid diffusion through cultural transition networks.

See full article...

 

[gizmo23]

Archery peeve: There's no fire involved in using a bow, so it's not "rate of fire" it's "rate of shot".
Other than that, really interesting article, but I was confused over the idea that introduction simultaneously over a large area corresponds to a single source.