Platypus Genome Found Fittingly Strange - washingtonpost.com

Platypus Genome Found Fittingly Strange - washingtonpost.com: "There are genes for egg laying -- evidence of its reptilian roots. Genes for making milk, which the platypus does in mammalian style despite not having nipples. Genes for making snake venom, which the animal stores in its legs. And there are five times as many sex-determining chromosomes as scientists know what to do with."