Scientists in the United Kingdom have discovered a rare bone, called the os cordis, in chimpanzees with a common heart condition. The implications of this finding could extend to humans, who share a close genetic relationship to chimps. Cattle, buffalo, and sheep have it. So do otters, camels, and dogs. Primates, not so much—at least that’s what scientists thought. The os cordis, a small bone found in the hearts of certain animals, is also present in some chimpanzees, according to research published today in Scientific Reports.