When seeing double is not always bad.
Ball
W S
WS
D000328:Adult; D001921:Brain / Q000033:anatomy & histology / Q000254:growth & development* / Q000502:physiology; D003071:Cognition / Q000502:physiology; D003337:Corpus Callosum / Q000033:anatomy & histology / Q000254:growth & development / Q000502:physiology; D004777:Environment; D006801:Humans; D007858:Learning / Q000502:physiology; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009473:Neuronal Plasticity / Q000502:physiology; D018433:Twin Studies as Topic; D014430:Twins, Monozygotic / Q000235:genetics