[T]he progenitors of all three dinosaur lineages — theropods, sauropods and ornithischians (the group that includes Triceratops) — originated in the portion of the supercontinent Pangaea that is now South America some time before 230 million years ago. From there . . . dinosaurs diversified and spread to dominate terrestrial ecosystems for more than 165 million years.
16 December 2009
Out Of South America
Humans have their origins in Africa. Fossil evidence suggests, however, that dinosaurs have their origins in South America.