Mysterious 'Obelisks' Discovered in Humans. But What Are They?

<img width="128" height="52" src="https://www.sciencealert.com/images/2024/02/WomanHasMouthSwabbed.jpg" alt="Woman Has Mouth Swabbed"/>
Hiding inside us all this time.

https://www.sciencealert.com/mysterious-obelisks-discovered-in-humans-but-what-are-they