Researchers have conducted a new analysis of the origins of ‘bird-hipped’ dinosaurs — the group which includes iconic species such as Triceratops — and found that they likely evolved from a group of animals known as silesaurs, which were first identified two decades ago.Researchers have conducted a new analysis of the origins of ‘bird-hipped’ dinosaurs — the group which includes iconic species such as Triceratops — and found that they likely evolved from a group of animals known as silesaurs, which were first identified two decades ago.