Why your archaeologist friend licks rocks?

No, this isn’t clickbait. I know, Archaeology isn’t known for making you rich, but, is your archaeologist, paleonthologist or geologist friend so desesperated and hungry to start licking rocks in a excavation?

Short answer: no, your friend is trying to guess if he has a rock or a fossil bone in their hands. Often, when we think about fossil bones we imagine the bones of a dinosaur, big and… how you can’t see them? But we have to remember that a lot of times we can find bones of a rodent, or bones that are very broken, sometimes they even are bone splinters (fragments of bones so broken and small that we can’t identify in that moment which bone is). These bones often are mistaken for rocks: They are hard, without a defined shape and sometimes they have the same colors of a rock. And we have to keep in mind that the ones who excavate are students, most of them. Naturally, they don’t know how to perecieve a rock or a bone.

There is the trick: Licking it. If it stays stick to the tongue, is a fossil bone. Why? The fossil bone is more porous, it absorbes the humidity of the tongue and sticks to it. The rock, falls.

You can imagine my face when my colleague in a excavation started licking rocks and bones to tell apart. I even did memes with the book of Karlos Arguiñano (a famous Spanish chef), and I said to him (it was an archaeological site of millions of years): ´You’ll see, if you catch a prehistoric bacteria we are going to be on the news´. Geologist from the future will find my friend’s drool when they analize those rocks.

erjavi
Real footage of my friend lickig rocks.