1. What important feature of modern humans can already be seen in 4-million-year-old Australopithecus fossils? 2. What was the first species of hominid to leave Africa and spread throughout Europe and...

1. What important feature of modern humans can already be seen in 4-million-year-old Australopithecus fossils?

2. What was the first species of hominid to leave Africa and spread throughout Europe and Asia?

3. How old is our species, the modern humans known as Homo sapiens sapiens?