06.25.11
The great explosion: clutching at single aspect theories
http://www.sciencedaily.com/releases/2011/06/110621093308.htm
These arguments are not very convincing; the need for a simplistic answer to the sudden emergence of modern man makes biologists clutch at single aspect theories..
Cutting Edge Training Developed the Human Brain 80,000 Years Ago
ScienceDaily (June 22, 2011) — Advanced crafting of stone spearheads contributed to the development of new ways of human thinking and behaving, according to new findings by archaeologists from Lund University. The technology took a long time to acquire, required step by step planning and increased social interaction across the generations. This led to the human brain developing new abilities.