One way that Stonethrowing is a compounding of Treeswinging is that the
opposable thumb is a compound form of the previous non-opposable-thumb.

Can someone tell me to what degree or extent that the Chimpanzee thumb is
opposable compared to a human thumb?

Another is the Rotator Cuff a compounding of the previous Cuff region of 10
million years ago.

Another compounding region for Stonethrowing is the lower back region of
the pelvis for fulcrum leverage in throwing. Those lower back bones have to
be compounded and increased in order for the thrower to throw with force
and strength.

Archimedes Plutonium
www.iw.net/~a_plutonium
whole entire Universe is just one big atom where dots
of the electron-dot-cloud are galaxies