Fill in the Blanks Butting HeadsOnline version ........... by Tea Cher 1 fall fossilized animal million SKATEBOARD creature layer neck HELMET giraffes helmet China Heads heads sturdy xiezhi unusual ? Built for Butting IF YOU'RE GOING OUT TO RIDE YOUR , IT'S IMPORTANT TO WEAR A . That way your head will be protected if you . Scientists have discovered an ancient that stayed safe in a similar way : by wearing its own built - in . The animal was found in . It lived about 17 years ago . Researchers named it Discokeryx , after a of legend . Although it didn't have a super - long , scientists say the animal was a relative of today's . The animal had a thick of bone on the top of its head . The bones in its neck were also surprisingly . Scientists think that long ago , these animals fought by bashing their together , and their head and neck bones kept them safe .
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