Does anyone have any info (hopefully references to articles in
scientific journals) on either of the following two phenomena:
1) microcephaly (or is it hydrocephaly?) - the condition where people
have most of the brain missing, and yet show normal IQ etc.
2) mentally-deficient people (or autistic people) who, without any
mathematical training, perform various feats (such as produce prime
numbers, etc.) (I am not interested in normal individuals who
perform these things for entertainment, with tricks, etc.)