Why this biologist loves unpopular animals, and more…

This episode of Quirks and Quarks explores a range of fascinating scientific topics, beginning with a deep dive into a 300-million-year-old fossil once believed to be the oldest octopus. Paleontologist Dr. Thomas Clements reveals through advanced imaging that the fossil, Falsipia, is actually a nautilus that lost its shell during decay, reshaping our understanding of cephalopod evolution. The episode then revisits a 1995 interview with Carl Sagan, who discusses the growing evidence of exoplanets and the possibility of life beyond Earth, reflecting on how science has fulfilled his childhood dreams. A study by Dr. Josh Cuddihy suggests that human evolution may have been shaped by fire, with genetic adaptations favoring survival from minor burns at the cost of complications in severe cases. The episode also examines a 14-year decline in spoken words—over 3,000 lost per day—driven by technology, with psychologist Dr. Valeria Pfeiffer warning of cognitive and social consequences. Finally, biologist Dr. Marlene Zook champions 'outsider animals' like rats, cockroaches, and raccoons, arguing that these often-maligned creatures offer vital lessons in adaptation, resilience, and coexistence. The episode closes with a call to rethink our relationship with the overlooked species that share our world.