And that's not to mention toes. What a feet of engineering they are. I also make horrendous music ► https://soundcloud.com/exurbia-1 New book ► https://tinyurl.com/hf928gk Previous book ► http://tinyurl.com/gluoz2k Twitter ► https://twitter.com/Exurb1a Facebook ► https://www.facebook.com/exurb1a/ Help me to do this full-time, if you're deranged enough ► https://www.patreon.com/exurb1r?ty=h Special thanks to: Biology, evolution, Darwin, and the prehistoric extraterrestrial engineers.