A long-time arrowhead collector, Kila's Tom Blais has been learning how to make the stone tools himself for nearly 30 years. (Jeremy Weber/Daily Inter Lake) Kila's Tom Blais uses traditional stone and ...

Sharp stone technology chipped over three million years allowed early humans to exploit animal and plant food resources. But how did the production of stone tools -- called 'knapping' -- start?

Sharp stone technology chipped over three million years allowed early humans to exploit animal and plant food resources, which in turn played a large role in increasing human brain size and ...