is the dihex convex Concave vs. Convex—What's Difference? Convex and Concave in Math
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What age do crows feet appear

Significant Weakness: If you can't lift your arm overhead or have severe functional limitations, surgery may be necessary to restore strength

[385], the evolution of Lewy bodies dispersion and spread from the lower medulla in PD may be reflected in the emergence of hyposmia and sleep behavior disorder

On balance I think the FDA should ban it, but the libertarian argument for letting not-obviously-dangerous-things exist seems reasonable

Pain receptors fire when nothing is wrong
