4 ms·

What?! This is the first I hear of this, though you appear to be correct. Mindblowing.

• ncmncm 6y ago
  Not only that--different species have used different parts for the thumb. A Jurassic pterodactyl ("wing-finger") had the earliest known opposable thumb. Pandas have their choice. Primates are late to the party, but might have a claim to most use. Some cats have joined. The most important key-chord is space, followed by backspace.
  • grawprog 6y ago
    Can't forget bats. There's a reason why their order is Chiroptera. >The name "Chiroptera" derives from Ancient Greek: χείρ – cheir, "hand"[4] and πτερόν – pteron, "wing".[1][5]