The New Dinosaurs

The New Dinosaurs: An Alternative Evolution is a 1988 speculative evolution book written by Scottish geologist and palaeontologist Dougal Dixon and illustrated by several illustrators including Amanda Barlow, Peter Barrett, John Butler, Jeane Colville, Anthony Duke, Andy Farmer, Lee Gibbons, Steve Holden, Philip Hood, Martin Knowelden, Sean Milne, Denys Ovenden and Joyce Tuhill. The book also features a foreword by Desmond Morris. The New Dinosaurs explores a hypothetical alternate Earth, complete with animals and ecosystems, where the Cretaceous-Paleogene extinction event never occurred, leaving non-avian dinosaurs and other Mesozoic animals an additional 65 million years to evolve and adapt over the course of the Cenozoic to the present day.

The New Dinosaurs is Dixon's second work on speculative evolution, following After Man (1981). Like After Man, The New Dinosaurs uses its own fictional setting and hypothetical wildlife to explain natural processes with fictitious examples, in this case the concept of zoogeography and biogeographic realms. It was followed by another speculative evolution work by Dixon in 1990, Man After Man.

Although criticised by some palaeontologists upon its release, several of Dixon's hypothetical dinosaurs bear a coincidental resemblance in both appearance and behaviour to dinosaurs that were discovered after the book's publication. As a general example, many of the fictional dinosaurs are depicted with feathers, something that was not yet widely accepted when the book was written.

The New Dinosaurs explores an imagined alternate version of the present-day Earth as Dixon imagines it would have been if the Cretaceous-Paleogene extinction event had never occurred. As in Dixon's previous work, After Man, ecology and evolutionary theory are applied to create believable creatures, all of which have their own binomial names and text describing their behaviour and interactions with other contemporary animals. Most of these animals represent surviving dinosaurs, pterosaurs and plesiosaurs, which Dixon discusses through biogeographic realms, divisions of the Earth's land surface based on distributional patterns of animals and other lifeforms.

In total, about sixty animals are described in the book, about half of the amount featured in After Man, with examples including a widespread group of tree-climbing coelurosaurian theropods called "arbrosaurs", huge striding and terrestrial pterosaurs such as the giraffe-like "lank", colonial pachycephalosaurs, descendants of the Mesozoic hadrosaurs called "sprintosaurs" adapted to a new lifestyle on the grass-covered plains of North America, amphibious hypsilophodonts, flamingo-like coelurosaurs and iguanodonts capable of jumping like kangaroos. In the far north, large migratory birds such as the "tromble" with legs almost like tree trunks, roam the land.

In terms of predators, the coelurosaurs dominate in terms of number and diversity, often having unique adaptations. For instance, the apex predator of the South American pampas, the coelurosaurian "cutlasstooth", has evolved huge, cutting teeth to allow it to prey upon large sauropods. The pampas is also home to the last of the tyrannosaurids, the large scavenging "gourmand". There are also various dromaeosaurids, including the "jinx", adapted to mimic larger herbivorous dinosaurs through scent and appearance.

The world's oceans are home to various pterosaurs, such as seagull-like and penguin-like forms. There is also the "whulk", a massive whale-like pliosaur that feeds exclusively on plankton. The "kraken", an enormous ammonite, uses specialized tentacles to entangle and sting anything that comes near it.

Following the success of his previous speculative evolution book After Man in 1981, Dixon realized that there was a market for popular-level books which use fictional examples and settings to explain actual factual scientific processes. After Man had explained the process of evolution by creating a complex hypothetical future ecosystem, The New Dinosaurs was instead aimed at creating a book on zoogeography, a subject the general public was quite unfamiliar with, by using a fictional world in which the non-avian dinosaurs had not gone extinct to explain the process.