Many of the animals presented in the book remain plausible even in the light of more modern discoveries, with particular examples including the rise of animals that were transported around the world by humans (for instance the rats) to prominent positions within worldwide ecology and that corvids and rodents could evolve into various predatory roles. Other ideas are seen as somewhat less likely, such as the theropod-like gait used by predatory descendants of baboons (though predatory baboons as an idea isn't considered as unlikely) and the evolution of penguins into huge, whale-like filter-feeders. Some of the animals featured in the book, in particular the popular "night stalker" (a giant and flightless predatory descendant of bats), have inspired numerous similar designs through speculative evolution projects since. Future flightless predatory bats are perhaps most famous for their inclusion within the ITV series "Primeval" (2007–2011) in the form of the "future predators".