dinosaur-evolution

Triceratops horns likely evolved for mate competition, display, and species recognition, with combat as a secondary use. This guide explains the fossil evidence behind ceratopsian horns.

Dinosaurs did not exist in a single monolithic era. They ruled Earth across three distinct geological periods spanning 165 million years — longer than the time separating us from the last non-avian dinosaur. Each period had its own continents, climates, ecosystems, and dominant species. Understanding what changed across the Triassic, Jurassic, and Cretaceous is the key to understanding why dinosaurs became what they became.