正是在此次灭绝之前，原始两栖动物第一次爬上了陆地。
Right before the extinction events, the first proto-amphibians made it onto shore.
直到至少1千万年以后，我们才又发现了脊椎动物在陆地上的足迹，这次是原始两栖动物ichthyostegalians，我们都是由它最终进化而来。
It wasn't until at least another 10 million years later that we got footprints from vertebrates on land again, this time from the ichthyostegalians, the proto-amphibians we're all descended from.
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