Here's a question for you. In 2006 scientists announced the discovery of a new hominin fossil: a juvenile Australopithecus afarensis. The media quickly dubbed it "Lucy's child" (well, it was a catchy name, even though the underlying implied relationship had no evidence to support it!). So, tell me, how could scientists be sure that this individual was an infant at time of death, from an examination of the skull and jaw?
(Use the 'questions & comments' button – yes, I know comments aren't enabled yet, & I'm hoping we can change this for 2008, but anything submitted through that link does get through to me.)