POV: It is 1100 A.D. on an Indonesian island. You are a Bajau sea nomad who freedives for seafood. Your spleen is 15% larger than other locals due to a mutation in PDE10A gene. You can store more haemoglobin rich blood, letting you breathhold & dive longer. Local girls notice how much better you are at diving and hunting fish. You are about to experience natural selection

RT: https://poa.st/objects/28ba144e-ece9-4486-a316-5682e46e6480