12 trends tracked about this subject — the full history, oldest to newest below.
A scientist surveying threatened frogs in San Mateo County unexpectedly discovered a 10,000-year-old fossilized mastodon tooth in a California creek bed.
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A scientist's search for frogs in the San Mateo hills led to the discovery of a rare Ice Age mastodon tooth in a local creek bed.
Analysis of ancient teeth has uncovered the Ice Age origins of the world's fourth most common addictive drug.
Researchers have identified the earliest known evidence of human drug use through the analysis of fossilized teeth dating back 25,000 years in Indonesia.
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New ancient DNA analysis reveals the 'American cheetah' was not actually a cheetah and survived in the Arctic Yukon.
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2 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
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Discoveries of 40,000-year-old mammoth ivory bird figures inside a German cave highlight early Ice Age artistry in recent global reporting.
11 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.