► Why do the origins of pre-human types get earlier and earlier, now at 3-5 million years ago?

►  What are the main factors that contribute to the precariousness of human existence since its beginning?

►  How relevant is brain size to abstract thinking and language sophistication?

►  Why is race an imprecise term?

►  Why is it believed that women have superior status to men in the Stone Age?

►  What is the role of major waterways in the beginnings of civilization along the Nile and the Yangtze Rivers?

►  What is the relationship of war to class society and slavery?

►  How does the invention of the plow which revolutionizes agriculture change society from matriarchal to patriarchal? 

►  What structures made over 3,000 years ago contained 2,300,000 stones each weighing 2-1/2 tons?

►  What is the evidence that brain surgery is practiced in ancient Egypt?

►  What are the features of Stonehenge in Southeast England that reflect the math and science genius of human brain power?