This graph shows the cranial capacities in cubic centimeters
for 118 fossil hominids plotted against time, extending back almost 3.5
million years. The arrow indicates the highly incongruous value reported
in Nature by Brown et al. in 2004 for H. floresiensis, described as an
insular dwarf derived from Homo erectus. The relatively tiny brain size
only 18,000 years ago does not fit into known patterns of hominid brain
size and development. It is "off the chart."