Happy Second Birthday to The Constant! To celebrate, we're tackling the story that everyone advised Mark not to tell, that Mark himself failed over and over again to write: The Brownian Ratchet. And along the way, we're dropping into a select few of the many, many perpetual motion machines people have claimed to invented over the centuries. Visit our Patreon here (https://patreon.com/theconstant).Get 10% off your first month of online counseling by visiting:http://betterhelp.com/theconstant (http://betterhelp.com/theconstant) and entering discount code "theconstant".Music by:Blue Dot Sessions (https://www.sessions.blue/)Lee Rosevere (https://leerosevere.bandcamp.com/)Kevin MacLeod (https://incompetech.com/)Learn more about your ad choices. Visit megaphone.fm/adchoices