Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Zoo Tycoon 2: Extinct Animals is a video game expansion pack for Zoo Tycoon 2 released October 17, 2007.The expansion focuses around extinct animals, mainly dinosaurs or ice age creatures, as well as today''s extinct creatures like the dodo or thylacine.This expansion pack follows the other expansion packs, Endangered Species, African Adventure and Marine Mania. Extinct Animals replaces, and includes the animals and objects from the similar Dino Danger Pack premium download.