Modern humans are very close genetically to apes BUT we have a defect in our jaw muscles...to make them small.
It is believed that this mutation/defect allowed our skull bones to float until we are 30 years old and allow our brain skull cavity to expand and grow. This does not happen in apes who's jaw muscles are locked down.
A great video series that explains how it happened and the discovery:
http://www.youtube.com/watch?v=5esFdZAjlVM&NR=1
It is believed that this mutation/defect allowed our skull bones to float until we are 30 years old and allow our brain skull cavity to expand and grow. This does not happen in apes who's jaw muscles are locked down.
A great video series that explains how it happened and the discovery:
http://www.youtube.com/watch?v=5esFdZAjlVM&NR=1




