The invention of the polished stone axe was a significant advance that allowed large-scale forest clearance and farming. This use of polished stone axes elevated greatly within the Neolithic however was originally used in the preceding Mesolithic in some areas such as Ireland. Agriculture fed bigger populations, and the transition to sedentism allowed for the simultaneous elevating of extra kids, as infants no longer needed to be carried around by nomads.
The cooking hypothesis proposes that the flexibility to cook promoted a rise in hominid mind size, though some researchers discover the proof inconclusive. Archeological evidence of hearths was dated …
