Quote:
Originally Posted by Stonius
I think it requires intelligence plus the dexterity to make and use tools.
Early humans used fire and hunting to increase the calories in their diets that allowed their brains to grow bigger, making even better tools.
Dolphins, corvids, dogs, etc are not dextrous enough. Octopus don't live long enough and are not social creatures so they can't hand down knowledge.
Markus
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Two things pop to mind, the first one says a lot imo.
1) We invented beer before we invented the wheel...
2) With fire and tools the mandible jaw muscle could be weaker, allowing the cranium to grow... which was a major step for us in increasing our brain capacity.
Kinda interesting to think that evolution can be affected by the use of tools over time within a species.