Marc Vitrac was born in Louisiana in the early 1960's, about the time the first interplanetary probes delivered the news that Mars and Venus were teeming with life--even human life. At that point, the "Space Race" became the central preoccupation of the great powers of the world.Now, in 1988, Marc has been assigned to Jamestown, the US-Commonwealth base on Venus, near the great Venusian city of Kartahown. Set in a countryside swarming with sabertooths and dinosaurs, Jamestown is home to a small band of American and allied scientist-adventurers.But there are flies in this ointment - and not only the Venusian dragonflies, with their yard-wide wings. The biologists studying Venus's life are puzzled by the way it not only resembles that on Earth, but is virtually identical to it.