This is the kind of thing I never get tired of: Figure S7 from the supplement of the Malapa foot paper by Bernhard Zipfel and colleagues .
We see too many papers where a fossil is displayed next to a chimpanzee and a human, maybe another hominin, as if they were Platonic types. Here we see immediately the variation among a good sample of hominin tali from East and South Africa. Four from Sterkfontein and four from Turkana, so you can see variation within those samples arrayed right across the figure. A figure like this takes more interpretation than a graph showing measurements or principal components, but it has a visual impact that a Cartesian plot can't match.
- . The Foot and Ankle of Australopithecus sediba. Science. 2011;333(6048):1417 - 1420.