Tiny dinos with fancy neck frills were big showoffs – Livescience.com

Adorable sheep-sized dinosaurs
probably evolved their fancy neck frills to attract mates or show off their dominance. 
Protoceratops a dinosaur that looked a bit like a mini-Triceratops
without horns had elaborate and varied neck frills. Paleontologists have debated what they were used for: Defense? Temperature regulation? Or perhaps, like modern birds with colorful tail feathers, the dinosaurs evolved the frills to show off their fitness to potential mates and competitors, a process of sexual…

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