UNITED NEWS INTERNATIONAL (UNI) — Ancient teeth found in France were once used by an ancient human relative to eat food but those same teeth later become food for something else.

Scientists say two teeth found at the Marillac archaeological site are from a Neanderthal that died 65,000 years ago.

Archaeologists first thought the teeth belonged to a different animal because the shape didn’t quite match those of a Neanderthal.

But researchers at the Center for Scientific Research in France now say this is because they were ingested.

Past research found both animal and Neanderthal bones with intentional butchery marks at the site.

This new study said a Neanderthal may have been cannibalized or killed and eaten by a large carnivore, like a cave hyena.

The teeth were hard to digest and came back up, but not before stomach acid changed their shape.

Researchers say the find sheds light on competition between Neanderthals and other large carnivores of the time.