Were Dinosaurs Failures?
Various dinosaurs (and a pterosaur) from the Hell Creek Formation. From back to front: Ankylosaurus, Tyrannosaurus, Quetzalcoatlus, Triceratops, Struthiomimus, Pachycephalosaurus, Acheroraptor and Anzu respectively. Image credit: Durbed (artist).
The word dinosaur is commonly used as an insult. It has become shorthand for something outdated, obsolete, resistant to change, or doomed to disappear. This modern cultural meaning stands in stark contrast to the actual scientific reality. Far from being evolutionary dead-ends, dinosaurs were one of the most successful and adaptable groups of animals to ever live. The notion of dinosaurs as lumbering, stagnant creatures unable to cope with environmental change is a myth created largely by early 19th and early 20th century interpretations. This antiquated concept emerged long before modern paleontology transformed our understanding (Benton, 2008).
In truth, dinosaurs were extraordinarily versatile. From their early origins in the Late Triassic, dinosaurs quickly diversified into a wide range of ecological roles. This includes fast predators, large herbivores, armored tank-like species, small feathered omnivores, long-necked high browsers, and even semi-aquatic forms (Brusatte, 2015). Their evolutionary flexibility allowed them to occupy every single terrestrial habitat on Earth, from equatorial deserts to high-latitude polar forests (Fiorillo & Gangloff, 2012). In doing so, dinosaurs adapted to extreme heat, seasonal climates, monsoonal floodplains, and environments that experienced months of winter darkness. They were able to modify limb proportions, respiratory systems, feeding strategies, and reproductive behaviors with evolutionary dynamism. Such traits are simply not seen in organisms incapable of change.
This adaptability directly contributed to their global dominance for more than 160 million years, an evolutionary reign far longer than that of mammals so far (Benton, 2015).
In fact, 160 million years of ecological success and dominance is highly unusual by evolutionary standards.
Most major animal groups rise and decline within far shorter intervals. Many clades experience brief bursts of success before being replaced. Dinosaurs, however, maintained top-tier roles as the primary large herbivores and predators on every continent from the Early Jurassic to the end of the Cretaceous. All the while weathering major climatic shifts, volcanic events, sea level changes, and continental breakup without losing their ecological prominence (Benton, 2015; Brusatte, 2015). This stability and great longevity make dinosaurs an exceptional case of sustained evolutionary success.
Therefore, the idea that dinosaurs were failures is therefore not only grossly inaccurate, but it is the exact opposite of what the fossil record clearly shows. Dinosaurs were innovative, resilient, and ecologically dominant. They were not archaic relics waiting for extinction, but one of nature’s greatest evolutionary success stories.
In truth, dinosaurs were extraordinarily versatile. From their early origins in the Late Triassic, dinosaurs quickly diversified into a wide range of ecological roles. This includes fast predators, large herbivores, armored tank-like species, small feathered omnivores, long-necked high browsers, and even semi-aquatic forms (Brusatte, 2015). Their evolutionary flexibility allowed them to occupy every single terrestrial habitat on Earth, from equatorial deserts to high-latitude polar forests (Fiorillo & Gangloff, 2012). In doing so, dinosaurs adapted to extreme heat, seasonal climates, monsoonal floodplains, and environments that experienced months of winter darkness. They were able to modify limb proportions, respiratory systems, feeding strategies, and reproductive behaviors with evolutionary dynamism. Such traits are simply not seen in organisms incapable of change.
This adaptability directly contributed to their global dominance for more than 160 million years, an evolutionary reign far longer than that of mammals so far (Benton, 2015).
In fact, 160 million years of ecological success and dominance is highly unusual by evolutionary standards.
Most major animal groups rise and decline within far shorter intervals. Many clades experience brief bursts of success before being replaced. Dinosaurs, however, maintained top-tier roles as the primary large herbivores and predators on every continent from the Early Jurassic to the end of the Cretaceous. All the while weathering major climatic shifts, volcanic events, sea level changes, and continental breakup without losing their ecological prominence (Benton, 2015; Brusatte, 2015). This stability and great longevity make dinosaurs an exceptional case of sustained evolutionary success.
Therefore, the idea that dinosaurs were failures is therefore not only grossly inaccurate, but it is the exact opposite of what the fossil record clearly shows. Dinosaurs were innovative, resilient, and ecologically dominant. They were not archaic relics waiting for extinction, but one of nature’s greatest evolutionary success stories.
References
Benton, M. J. (2008). Prehistoric Life: The Definitive Visual History of Life on Earth.
Benton, M. J. (2015). Vertebrate Paleontology.
Brusatte, S. L. (2015). The Rise and Fall of the Dinosaurs.
Benton, M. J. (2008). Prehistoric Life: The Definitive Visual History of Life on Earth.
Benton, M. J. (2015). Vertebrate Paleontology.
Brusatte, S. L. (2015). The Rise and Fall of the Dinosaurs.