Simplify the following text for a Grade 12 native English-speaking person.
Original: The ancestor of modern humans ( Homo sapiens sapiens ) who appeared around 50,000 years ago was more developed and could fabricate thinner flake tools and blade-like tools using a variety of stones .
Simplified: The ancestor of modern humans ( Homo sapiens sapiens ) who appeared around 50,000 years ago was more developed and could make thinner flake tools and blade-like tools using a variety of stones .