The co-discoverer of the split brain" theory tells how science is recasting the age-old question of nature versus nurture to create a startling new view of human behaviour. Recent discoveries suggest that natural selection affects not only physical characteristics but also mental processes, from learning to substance abuse.

The co-discoverer of the split brain" theory tells how science is recasting the age-old question of nature versus nurture to create a startling new view of human behaviour. Recent discoveries suggest that natural selection affects not only physical characteristics but also mental processes, from learning to substance abuse.

The co-discoverer of the split brain" theory tells how science is recasting the age-old question of nature versus nurture to create a startling new view of human behaviour. Recent discoveries suggest that natural selection affects not only physical characteristics but also mental processes, from learning to substance abuse.