In biology, a `clade` is a complete branch of the evolutionary family tree. It defines categories of living things by their evolutionary history. This powerful concept has revolutionized the way scientists classify living things, and Clades, an animal-matching card game about evolutionary descent, makes it easy and fun. Details: No taking turns. Everyone plays at the same time. Young and old can play together. Lots of cute animals. Clades: Prehistoric has dinosaurs, sea scorpions, woolly mammoths, and other extinct animals. Includes science facts in the rulebook and on animal information cards. Play the two games separately or together. What It’s About: A clade is a complete branch of the evolutionary family tree. In these games, the major clades are mammals, arthropods ("bugs"), and sauropsids (reptiles and birds together). Each major clades includes three smaller clades, such as "bats" or "turtles." Each smaller clade is linked to one of three environments: water, land, or air. The cards show which sorts of animals are more closely related to each other and which less closely. Contents: Rulebook 83 playing cards 5 science fact cards 1+ players, 15-20 minutes, ages 6+.