Deep within the flooded chambers of a remote Mexican cave, explorers initially mistook a glinting object for a piece of 21st-century trash. But what they had actually uncovered was something far more special.

https://www.iflscience.com/daring-explorers-find-mesomerican-fertility-ritual-in-depths-of-a-mexican-cave-79364
“Trash” Found Deep Inside A Mexican Cave Turns Out To Be 500-Year-Old Artifacts From Little-Known Culture

The explorers first thought it was a piece of garbage, but how wrong they were.

IFLScience