Fossilized 10,000-year-old mastodon tooth found by California scientist
Brigid Lynch, a geomorphologist, was working at a preserve in San Mateo county, when she stumbled across a peculiar rock.
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Brigid Lynch, a geomorphologist, was working at a preserve in San Mateo county, when she stumbled across a peculiar rock.
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Brigid Lynch, a geomorphologist, was working at a preserve in San Mateo county, when she stumbled across a peculiar rock.
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