What do heat and temperature have to do with biology? (It turns out, a lot!) We know what periods are, but why do humans have them? And stickers are delightful but how did they come about?Support us with a Max Fun Membership!Join our Discord!We also learn about: what is heat? endotherms ectotherms homeotherms heterotherms and poikilotherms, being warm blooded evolved twice, heat generating plants, naked mole rats are weird, the podcast's stable of strange animals grows, kleptothermy, everyone huddles, which animals have periods? mansplaining periods, elphant shrews, convergent evolution of periods, spontaneous decidualization, "pregnancy is parasitic", women's reproductive research is underfunded, georgian beauty standards, stamp based tangents, bumper stickers, and our favorite stickers.            Sources:                Richard Feynman's "Six Easy Pieces" BookEndotherms and EctothermsThermoregulationOryx HeterothermyQuelea High Body TemperatureMcKechnie's Blog Post on the paperThe evolution of EndothermyBeehive Temperature RegulationDesert Ant ThermotoleranceThermogenesis in PlantsColor Changing Thermal BiologySloth PoikilothermyMore Sloth PoikilothermyPoikilothermy and Huddling in Naked Mole RatsKleptothermyForbes: Why Did Women Evolve Periods?DecidualizationThe Evolution of Menstruation: A New Model for Genetic AssimilationThe Significance and Evolution of MenstruationGrackhouse's History of StickersThe History of Sticker PrintingThe History of Postage StampsAvery Dennison HistorySmithers: The Value of the Sticker Market