Why is my cat green? Signalling danger to the future. With cats.

Imagine you’re 100 years in the future, exploring a deserted landscape with your trusty cat sidekick. Your cat suddenly turns green. What does it mean? Hopefully, you’ll remember the song your grandma taught you as a kid. Your cat is green because you have stumbled across some nuclear waste. Time to scarper, and maybe reward your newly green cat with some fish. More