Food For Thought

Do we owe our intelligence to mutation that reduced our species’ jaw size and strength? A new Gene study suggests early humans traded mighty bite for bigger brains. About the time our hominid ancestors started developing bigger brains a genetic mutation appeared that crippled the development of powerful jawbones and their requisite muscles girdling the skull. The theory goes that once the skull was freed of the burden of supporting massive jaw and cheek muscles, early hominid cranial size exploded.