Native Americans were gambling with dice 6,000 years earlier than anyone else, study says

Archaeological record suggests hunter gatherers were playing games of chance at the end of the last ice age ...

Native American use of dice, probability predates currently known Old World dice by millenia

In total, archaeologist Robert Madden observed 659 sets of Native American dice from 57 archaeological sites across 12 different states.
Ars Technica

A probability question with lots of dice: how do I calculate this?

It's been a long time since I scraped through my probability and stats class in college... There is a time-killing dice game a friend (seems to have) invented: You start with a pool 10 6-sided ...