<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Not sure if I missed it, but there’s Dollo’s Law:</div><div><br></div><a href="https://en.m.wikipedia.org/wiki/Dollo%27s_law_of_irreversibility">https://en.m.wikipedia.org/wiki/Dollo%27s_law_of_irreversibility</a><div><br></div><div>I first ran into in Brooks’ and Wiley’s _Evolution as Entropy_, an old book, but still worth a glance.<br><br><div dir="ltr"><div style="line-height: normal;"><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);">Regards,</span></div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);"><br></span></div><div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);">Dan</span></div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);"> Sample my Kindle books at:</span></div><div style="line-height: normal;"><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Helvetica;"><span style="font-size: 12pt;">http://author.to/DanUst</span></p></div></div></div></div></div></body></html>