Spin of particles

https://en.wikipedia.org/wiki/Spin%E2%80%93statistics_theorem

spin is the property of angular momentum rotations symmetry

https://en.wikipedia.org/wiki/Spin_(physics)#Rotations

PBS videos

july 2021 Electrons DO NOT Spin
sept 2021 How Electron Spin Makes Matter Possible
june 2021 How Quantum Entanglement Creates Entropy

Spin of photons and phonons

https://www.reddit.com/r/askscience/comments/3cgtqs/do_phonons_have_spin/
https://physics.stackexchange.com/questions/78003/phonon-carries-zero-spin-why

• https://en.wikipedia.org/wiki/Spin_angular_momentum_of_light

• 2017 Do phonons carry spin?

http://pure.tudelft.nl/ws/portalfiles/portal/72393576/PhysRevB.101.104402.pdf

speculative???

Bosons, Fermions, Spin, Gravity, and the Spin-Statistics Connection