the.com/bioluminescence
life's answer to darkness: cold fire made of chemistry, not heat
cold lightconverts nearly all energy to light, almost no heat
deep seamost ocean creatures below glow in some way
luciferin namenamed after Lucifer, meaning light-bringer
fungal glowsome mushrooms shine green to lure spore-spreading insects
defensive vomitsome squid spew glowing clouds to blind predators