[Fractal Trader]

The human skull and jaw began to shrink starting a million years ago. The most likely explanation was that after the discovery of fire, they didn’t need the jaw strength that they previously did. I think that an argument could also be made that, with the invention of tools to scrape meat off the bone, there was also less jaw force required.

Which do you this it is, or is it both?

[SunkenCiv]

The physiological changes led the way — and we adapted our methods and tools to match. To suggest the reverse is just semantically adjusted Lamarckism.

[freedumb2003]

>> The most likely explanation was that after the discovery of fire, they didn’t need the jaw strength that they previously did. I think that an argument could also be made that, with the invention of tools to scrape meat off the bone, there was also less jaw force required.<<

The most likely explanation is that the jaw needed to be realigned to form the words “carbon credits” — thus evolved liberals.

[minnesota_bound]

Jaws got smaller due to discovery of fall off the bone ribs recipe.
http://www.jennycancook.com/recipes/fall-off-the-bone-ribs

[Harmless Teddy Bear]

Cooked vegetables and meat take less jaw strength to chew and have more available nutrients.

We are the only species that cooks and the only one that has no fear of fire.