9 months ago
Last edited at 4:20PM on 3/6/2013
What Leonard was referring to was actually the species Homo habilis. Homo habilis is a species of the genus Homo that lived approximately 1.4 to 2.33 million years ago. While sharing the same genus as Homo sapiens (humans), H. habilis are the least similar to modern humans in the genus. They are thought to have been short with disproportionately long arms and a cranial capacity slightly less than half the size of modern humans. In the episode, Leonard was using this term to insult Penny's ex-boyfriend by referring to him as a species relatively similar to modern humans but lacking the same intellectual prowess or evolutionary success. Hope this helps.