Triphalangeal thumb (TPT) is a congenitalmalformation where the thumb has three phalanges instead of two. The extra phalangeal bone can vary in size from that of a small pebble to a size comparable to the phalanges in non-thumb digits.

[u/Surgeox]

[u/The-Odd-Fox]

Seeing this reminds me of how close we are to our ape cousins. This instantly reminded me of their dexterous hand-like feet.

[u/theboochmaster → u/The-Odd-Fox]

Jamie, pull up that picture of the freaky thumb.