Plaque on 400,000-year-old human teeth shows we've always loved to barbecue

Analysis of the teeth showed that plaque contained, among other things, traces of charcoal from indoor fires, used to prepare caveman-era barbecues.

Barkai said in a press release that this means that Paleolithic humans had to face certain challenges, like, how do you keep charcoal smoke from embedding into your teeth? In his words:

This is the first evidence that the world’s first indoor BBQs had health-related consequences… The people who lived in Qesem not only enjoyed the benefits of fire — roasting their meat indoors — but they also had to find a way of controlling the fire — of living with it.

The scientists also found that there was some plant matter in the plaque, suggesting that maybe our prehistoric ancestors were into flossing. Barkai also noted that this could be the oldest proof of human-made pollution. Thanks a lot, early humans.

Danielle Wiener-Bronner is a news reporter.