In a discovery that has paleontologists reaching for their smelling salts and the rest of us reaching for Google Images, a California scientist has unearthed a 10,000-year-old mastodon tooth in remarkably pristine condition. Brigid Lynch, a geomorphologist, was working at a preserve in San Mateo county when she stumbled across what she initially assumed was just another rock. Rocks, it turns out, do not typically have molars.

Paleontologists later confirmed the object was an adult Pacific mastodon molar, according to a Wednesday news release from the Midpeninsula regional open space district (Midpen). The tooth, it seems, had been waiting patiently for someone to notice it for roughly ten millennia - which is longer than most of us wait for a reply text.

"The tooth itself is in immaculate condition. It's the most complete mastodon molar from our area, and the most spectacular mastodon molar that I've ever seen. I had chills and shivers up and down my spine," said paleontologist Wayne Thompson in a statement. "It's another puzzle in the Ice Age saga that we can put into place." Thompson, presumably, has seen a lot of mastodon molars and does not impress easily.

The Pacific mastodon, a relative of modern-day elephants, was most prominent in the American west, including what is now California, Oregon, the northern Rocky Mountain region and parts of Mexico. The herbivorous mammal dates back about 2.5m years in North America and went extinct more than 10,000 years ago, done in by the climate crisis's effects on their habitat coupled with overhunting from humans - a cautionary tale that humanity has, historically, chosen not to read.

The fossilized tooth has been donated to Stanford University, where researchers at the school of sustainability will employ carbon dating to determine the molar's exact age, according to Midpen. Because "10,000 years old" is apparently a rough estimate, and science prefers precision.

"Fossils are our only opportunity to see into past biodiversity," said Christine Garcia, a curator and manager of the geoscience specimen collection at Stanford. "We can study fossils to better understand Earth's past, past wildlife and the ecosystem they were a part of, and to help us make better predictions and better decisions about how to help our ecosystems and biodiversity thrive into the future." A noble goal, though the mastodons might have a few notes on how that worked out for them.

Several ancient mastodon fossils have surfaced in recent years. In 2024, a New York state resident found a mastodon jaw under the surface of their lawn. A year prior to that, a woman stumbled across a foot-long ancient mastodon tooth sticking out of the sand on a beach near California's central coast. At this rate, mastodon remains are on track to become the most reliable thing you can find by accident - edging out loose change and forgotten AirPods.