"And here we're talking about the late Jurassic, early Cretaceous, or late Triassic period. So, we're looking at about 180 million years ago [...]. These Bushmen, the San, had worked out that in the lower layers you had the tracks of animals walking on four feet. And in the upper layers you have the tracks of animals running around on two feet. And they had the most amazing interpretation for this [...]. It's a very sophisticated interpretation based on the fact that these people didn't read; it's all oral history, but they could interpret, and to me, it's just an amazing thing because they're talking about locomotive biology. They're talking about the idea of faunal succession [...]. The San, the Bushmen—I might be biased because I love working with them, but I think of them as the finest trackers that the world has ever known," Professor Helm stated.
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