Humans split from arboreal apes and became terrestrial apes
Humans split from arboreal apes and became terrestrial apes, due to a chromosome fusion/inversion, probably simultaneously with the inversion of the standard arboreal ape bowl nest into the predecessor of the dome hut, the dome shield, a sort ofumbrella of twigs and leaves. Sleeping endomed reduced the normal advantage of fur, being a rain-shedding sun-shading bug-screening camouflaged shield, mother & infant under one, father and toddler in adjacent one, and others sleeping around the base of
Jeff Goldberg @Quora:changes, longer arms and fingers & shorter legs in daily climbing arboreal apes, longer legs and thumbs & shorter arms in daily carrying-striding terrestrial humans. The dome shields were portable ground shelters, carried while foraging (basket) &
While certainly plausible, I would be interested to know the argument for the “23 and human” merger being so closely tied to the move to the ground and use of ground-based shelters.
We see no arboreal apes with 23, only 24 chromosome pairs, indicating a permanent isolation, despite humans, gorillas, chimps and bonobos overlapping in econiche, diet & geography. Accompanying the change was the polarising division of limb and digit
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