FIGURE 3. Drawings of the mammoth tusk with human-made marks, a side-scraper and a bifacial stone tool (knife?) that were uncovered from the excavated river channel deposits at the Mamontovaya Kurya section.

From the following article:

Human presence in the European Arctic nearly 40,000 years ago

Pavel Pavlov, John Inge Svendsen and Svein Indrelid

Nature 413, 64-67(6 September 2001)

doi:10.1038/35092552

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