B. Smith via Flickr Creative Commons

For the first time in decades, scientists are excavating fossils from an 80-foot-deep cave in North Central Wyoming.

The cave is called “Natural Trap Cave,” because it’s become the final resting place for countless animals in past centuries—including many now-extinct ones like mammoths, short-faced bears, and American lions.

Julie Meachen is a paleontologist at Des Moines University. She’ll rappel into the cave with a team of 15 others.

A group called One Million Bones is hosting genocide awareness events across the country Saturday, including in Cheyenne.

Amanda King, a UW student who’s helping out with the program, says people will gather and create a symbolic mass grave, with fake bones, to represent victims of genocide.

“As the symbolic grave is laid in front of us, we’ll discuss contemporary cases of genocide, and we’ll educate the participants who are there on conflicts that are currently happening today,” King said.