Please note: This is a companion version & not the original book. Sample Book Insights: #1 Humans are comparatively poor athletes on land. The world's fastest humans can only sprint about 23 miles per hour for about half a minute. Humans almost always hunt with weapons because no person could ever match a chimp for speed, power, and agility. #2 The first major transformation in human evolution was bipedalism, the ability to stand and walk on two feet. The human body is so thoroughly adapted to being habitually bipedal that we rarely give our unusual way of standing, walking, and running much thought. #3 The term missing link is a frequently misused word that generally refers to key transitional species in the history of life. However, there is one particular species in the record of human evolution that is missing: the last common ancestor of humans and the other apes. #4 The human evolutionary relationship with chimps was a surprise to scientists in the 1980s when the molecular evidence necessary to resolve it became available. The human evolutionary relationship with gorillas was already well-known, as they look similar to humans.