Did you know that menopause is an "evolutionary oddity"? Humans are the only terristrial mammal with this trait, and then there are 5 different species of Odontocetes (the group of toothed whales, dolphins and porpoises) that have it as well. Why is it so rare, why did it evolve, what are the benefits, and costs? It is hard to figure out the why, when there aren't many species to compare. But looking at whales, who are very different (our last common ancestor with them is 90 million years ago) physically and ecologically, who show the same trait provides some unique insights into the why and how it evolved. Paper is open access and available HERE Check out This Podcast Will Kill You - Menapause episode HERE