Corn and colleagues constructed a dynamic testing device to measure cutting performance of shark teeth using a reciprocating saw. Pictured is a blade with Bluntnose Sixgill Shark teeth attached. Photograph by Katherine Corn. See K.A. Corn et al., Modelling tooth-prey interactions in sharks: the importance of dynamic testing. R. Soc. open sci. 3: 160141. http://dx.doi.org/10.1098/rsos.160141.