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Number and Origin of Clamshell Tools Found at Different Depths below the Surface in Neanderthal Cave | ||
---|---|---|
Depth of tools found below the surface in a cave (meters) | Clamshells that Neanderthals collected from the beach | Clamshells that Neanderthals harvested from the seafloor |
2-3 | 7 | 0 |
3-4 | 99 | 33 |
4-5 | 2 | 0 |
5-6 | 18 | 7 |
6-7 | 1 | 0 |