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在南美洲、澳大利亚,人们较早就发现了恐龙化石,最近科学家又在南极发现了侏罗纪(距今大约2亿年前)和白垩纪后期(距今大约1亿年前)的恐龙化石。从物种进化的角度来说,不同地方的物种进化为同一物种的概率非常小,更可能的是,其一物种在一个地方产生,然后经迁徙扩散到世界各地去。所以,南极恐龙化石的发现,使得科学家猜测,在侏罗纪,澳洲大陆与南极大陆、南极大陆与南美大陆是相连的,恐龙就是从南美大陆进入南极洲,然后横穿南极大陆才到达澳大利亚的。
In South America and Australia, dinosaur fossils were discovered earlier, and recently scientists in the Antarctic found dinosaur fossils of the Jurassic (about 200 million years ago) and the late Cretaceous (about 100 million years ago) . From the perspective of species evolution, the probability of species from different places evolving into the same species is very small. More likely, one species is produced in one place and then migrated to all over the world. Therefore, the discovery of Antarctic dinosaur fossils made scientists speculate that during the Jurassic, the continent of Australia and the Antarctic continent, the Antarctic continent was linked to the South American continent. Dinosaurs entered Antarctica from the mainland of South America and then crossed the Antarctic continent to reach Australia.