Fortunately, it didn't turn out to be a mammoth - it was something even far older.
A team of researchers spent two days on Santa Cruz Island excavating and determined it was a jawbone from an extinct whale species.
Lotus Vermeer of the Nature Conservancy says the bone was found in a rock formation estimated to be between 9.5 million to 25 million years old - long before mammoths roamed the Channel Islands.
The team dug out the bone and cast it in plaster. The bone, about 3 feet in length, then was airlifted out via a helicopter.
A number of other bones were found nearby that could be even older and may include an intact whale skull.
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