Before revision: There is also debate about whether anatomically modern humans had an intellectual, cultural and technological "Great Leap Forward" under 100 ,000 years ago and, if so, whether this was due to neurological changes that are not visible in fossils.
After revision: There is also debate about whether anatomically modern humans had an intellectual, cultural and technological "Great Leap Forward" under 40,000–50 ,000 years ago and, if so, whether this was due to neurological changes that are not visible in fossils.