in the 1990s

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which protected them from predators and allowed them to move through difficult terrain

the horns could have been used to defend against attacks by Tyrannosaurus and other predators of the time

Yinlong downsi Platecarpus in the 1990sYinlong downsi is the only known species of the extinct Yinlong genus of chaoyangsaurid ornithischian dinosaur, which lived at the end of the Jurassic period, approximately 158 million years ago, in the Oxfordian, in what is now Asia. Yinlong downsi was a modest sized dinosaur compared to some of its later ceratopsian relatives. It measured around 1. 2 meters in length and weighed approximately 20 kilograms. It had a relatively small head compared to