Who first crossed the oceans? : Who raised the megaliths? : Where did Homer's heroes come from? / Lionel Casson --

What caused the sudden rise of modern man? / Robert Claiborne --

Who were the mound builders? / Brian Fagan --

Why did the ancients not develop machnery? : Where did ancient traders sail? : China and the west: which was first? / Lionel Casson --

How did human races originate? / Walter Karp --

How has climate affected history? : Who were the indo-europeans? / Robert Claiborne --

What caused the collapse of the Maya? / Brian Fagan.