Protoceratopslived in groups. They laid eggs in nests. They had medium-sized brainsand were sort of smart. Protoceratops walked slowly on four legs.

• 原角龙是群居生活。它们把小恐龙生在自己的窝里。原角龙的脑袋中等大小，所以它们有点聪明。它们走路用四只脚，走得比较慢。