This is Episode 80. It's all about flightless birds, and about the evolutionary processes that lead to flightlessness.Flightlessness in birds is, in my opinion, a fascinating scientific topic. And so here we are with this episode.Alive on the planet today, there are about 60 bird species that can\u2019t fly. That\u2019s only about 0.54 percent of the world\u2019s approximately 11,000 species.It turns out there were way more flightless bird species out there before humans started exploring and colonizing eve...