Fascinating! It just so happens I watched episode 3 of Connected on Netflix yesterday and they found the oldest man poop known — 50,000 years — and apparently dog poop with it, in a cave.

Also, I'm working on an episode for my YouTube channel about microbes in & on us, and the experts recommend having a dog to give you two more years of life and healthier immunity. I just read this book over the weekend and one way they keep us healthy is to keep us from losing all our microbes: