Cranial Capacity in Neanderthals and Modern Humans

Brain size (lnbrain) and body mass (lnmass) in Neanderthals and early modern humans (species).

Usage

NeanderthalBrains

Format

A data frame with 39 observations on the following 3 variables.

ln.mass

log of body mass (kg)

ln.brain

log of brain size

species

a factor with levels neanderthal recent

Source

Ruff, C.B., E. Trinkaus, and T.W. Holliday. 1997. Body mass and encephalization in Pleistocene Homo. Nature 387: 173-176.

Examples

xyplot(ln.brain ~ ln.mass, data=NeanderthalBrains, groups=species)