exploratorium:

The tooth of a WOOLLY MAMMOTH, believed to have roamed the Bay Area 10-15 million years ago, was found beautifully preserved Monday, deep in San Francisco mud at the Transbay Transit Center Project! Learn more about finding patterns in teeth and how we read life stories written in them: http://www.exploratorium.edu/evidence/lowbandwidth/index.html#finding
woolly mammoth (via Mammoth tooth found at Transbay dig - SFGate)

exploratorium:

The tooth of a WOOLLY MAMMOTH, believed to have roamed the Bay Area 10-15 million years ago, was found beautifully preserved Monday, deep in San Francisco mud at the Transbay Transit Center Project! Learn more about finding patterns in teeth and how we read life stories written in them: http://www.exploratorium.edu/evidence/lowbandwidth/index.html#finding

woolly mammoth (via Mammoth tooth found at Transbay dig - SFGate)