Along the lines of ‘tooth art’ that I have seen on the front covers of the BDJ over the last few months, I saw these in a garden centre. Although perhaps not to everyone's taste, I think that they may be used as modern day scarecrows in people's gardens as they are so unpleasant! The one with the tongue reminds me of the front cover of a Rolling Stones album!
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Graham, R. Mouthy stones. Vital 10, 5 (2013). https://doi.org/10.1038/vital1667
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DOI: https://doi.org/10.1038/vital1667