What Slew An Ancient Mastodon? DNA Tells Tale | WAMU 88.5 - American University Radio
Filed Under:

What Slew An Ancient Mastodon? DNA Tells Tale

Play associated audio

More than 13,000 years ago, hairy elephant-like creatures with giant tusks roamed North America. These mastodons were hunted by some of the earliest people to live here, and scientists recently learned a bit more about those mysterious cultures by taking a new look at an old mastodon bone.

This particular mastodon took his last breath in what is now the state of Washington, on the north side of the Olympic Mountains. His bones rested underground until the late 1970s. "It was discovered by accident," says Michael Waters, director of the Center for the Study of the First Americans at Texas A&M University, who explains that a farmer was excavating with his backhoe.

Washington State University scientist Carl Gustafson excavated the bones. "What he discovered there was a single mastodon. It was an old adult male; it was laying on its left side," says Waters.

The bones had cut marks that suggested humans had butchered the animal. One rib looked particularly interesting: X-rays showed that wedged inside was the point of a spear, made from antler or bone.

Gustafson dated this archaeological site to 14,000 years ago, starting a controversy that has lingered for decades. "It's been debated ever since, with some people accepting the site and other people not accepting the site," says Waters.

At the time, most scientists didn't believe humans lived in North America that early, so they said it couldn't be that old. Others said maybe it wasn't even a spear point.

"You know, it was suggested at one point that this may have been an elk antler tine that somehow got into the bone, like there was an angry elk that charged the elephant," says Waters.

Waters wanted to revisit this intriguing find using modern technologies, so he called Gustafson.

The now-retired professor went to his basement, retrieved the rib, and put it in the mail. Waters and his colleagues got to work. "We can do high-resolution CT scanning of the bone, and we can even do DNA analysis," says Waters, "and that's exactly what we did."

Studying The Spear Tip

The CT scans let them build a 3-D model of what was stuck inside the bone. It is a spear point, says Waters. "You could clearly see that the piece had been sharpened to a sharp tip and that the tip had broken off upon impact and rotated a little bit off to one side." He says that type of breakage is often seen in stone spear tips.

Plus, DNA analysis showed that this spear tip was made of mastodon bone — suggesting the hunters might have taken this material from a previous kill.

The research team also confirmed that the ancient hunt happened 13,800 years ago.

This isn't the first evidence that humans were living in the Americas this early. In recent years, scientists have been pushing back the date that people first set foot here. But Waters says they don't know much about those communities of hunter-gatherers.

"I think what it does is it just provides additional evidence and fills a little bit out about the picture of people here before Clovis," says Waters, referring to the Clovis culture that appeared hundreds of years later.

The distinctive hallmark of Clovis is a beautifully crafted spear point made of stone. Writing in the journal Science, Waters and his colleagues say this mastodon kill indicates that earlier people might have relied on bone weapons.

And apparently, they could orchestrate a sophisticated attack on a massive beast, sticking a spear through its thick hide and around 10 inches of muscle.

The new date on the bones is convincing, says Jonathan Haas, an expert on the ancient Americas at The Field Museum in Chicago. "And I think that that was an extremely interesting time in North America, as people were beginning to colonize an open continent. That's what I think is particularly interesting about this story."

Haas says back then, America was a wild, still unexplored place where animals like mastodons probably didn't even know to run when they saw a small band of humans creeping closer, carrying spears.

Copyright 2011 National Public Radio. To see more, visit http://www.npr.org/.

NPR

Christmas Bells Are Ringing, And Cable Holiday Movies Are Unrelenting

Christmas cable movies are a genre unto themselves. We take a look at some of the Hallmark (and other) romances that are surprisingly big business this time of year.
NPR

Coca-Cola Wades Into Milk Business With 'Fairlife'

The milk is now for sale in a limited number of stores — including the Coborn's in Belle Plaine, Minn. Ari Shairo talks with Coborn's dairy manager, Steven Thueringer.
WAMU 88.5

Forthcoming MoCo Legislation Targets Smoking, Alcohol, Pinball

The start of Maryland's General Assembly session is a little less than two months away, but state lawmakers are already crafting bills that propose certain alcohol and tobacco regulations. And pinball.
NPR

In Darren Wilson's Testimony, Familiar Themes About Black Men

Wilson's descriptions of Michael Brown reminded some people of negative depictions of African-Americans in history. Recent studies suggest these perceptions have deeper psychological roots.

Leave a Comment

Help keep the conversation civil. Please refer to our Terms of Use and Code of Conduct before posting your comments.