Figure 2.

Nit-picking is an ancient habit, as seen in (a) apes (photograph by Eric C Matthews, reproduced with permission) and in humans as shown in (b) a painting by Jan Siberechts, Cour de ferme, 1662. Musée des Beaux-Arts, Brussels, Belgium.

Weiss Journal of Biology 2009 8:20   doi:10.1186/jbiol114
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