https://www.supercoloring.com/search/coloring/head-butting
7 free coloring pages about "head-butting" to print and color. Creative fun for children and adults.
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https://www.livescience.com/10650-dog-sized-dinosaur-thick-head-butting-skull.html
A plant-eating dinosaur with a lump on its head roamed what is now Big Bend, Texas, some 80 million years ago, according to a dinosaur fossil.
thick headlive sciencedogsizeddinosaur