The 3,300-year-old monument has sat in the French capital's center for almost 200 years, but no one else noticed these strange encryptions.

Researchers compared puncture marks on an 1,800-year-old skeleton in the UK to various animal bites, and concluded that the individual was likely bitten by a lion.

The remains belonged to around 150 men between the ages of 20 and 30—all victims of a fierce battle.