From anthropologist Todd Wood at his blog:
First up, in a surprisingly speculative paper in the South African Journal of Science, Wits professor Francis Thackeray proposed that the bones of H. naledi had lichen stains on them from exposure to light. If correct, the resting of the bones on the surface would imply that the bodies of H. naledi were not intentionally deposited in the Dinaledi chamber but just fell in there. I say this was speculative, since Thackeray’s argument (as I understood it) was based on visual similarity of some stains on the bones to stains on some rocks that might have been made by lichens. More.
Colleagues say no, the stains are not consistent with lichen growth in sunlight.
One wonders how they would all just happen to have fallen in there.
See also: Todd Wood: New findings on homo Naledi?
Todd Wood on whether homo Naledi buried their dead
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