That’s a fascinating idea—think of ice as a natural photonic crystal, guiding photons through its ordered lattice. At cryogenic temperatures the tissue’s refractive index changes, so you could get enhanced light transport and maybe even new ways to stimulate cells. I’d love to model how the ice’s Bragg planes line up with the wavelengths we use for imaging or therapy. It could open a whole new set of cryogenic biophotonics techniques!