Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Millions of years ago, apex predators in the Phorusrhacidae family ...

The 12-million-year-old fossil, known as a tibiotarsus, belonged to a now-extinct creature in the Phorusrhacidae family, which was made up of mostly flightless, giant, meat-eating birds known ...