Canada's buildings have an emissions problem. Could fish skin provide an answer? “The idea of a building with veins came to Kay during his master's degree at the Univ of Toronto, where he studied how marine organisms like squid and krill release pigmented fluids in their bodies to change the opacity of their skin to regulate exposure to heat and light. “ https://www.cbc.ca/news/science/what-on-earth-building-emissions-fish-skin-1.6988165