She said: “I was alarmed to discover that my dog turned GREEN overnight. “Dog saliva contains iron porphyrins. They quickly consumed all of the oxygen in her neck swamp, which prevented the red staining typically associated with dog saliva. Instead, green rust formed. “Green rust is rare today because it is unstable in the presence of oxygen, but it may have been common on the ancient Earth before our atmosphere became oxygenated.

Source: Daily Mirror July 20, 2021 15:22 UTC