BRAIN scans have provided the most compelling evidence yet that being gay or straight is down to biology rather than choice. Tantalisingly, the scans reveal that in gay people, key structures of the brain governing emotion, mood, anxiety and aggression resemble those in straight people of the opposite sex.
“This is the most robust measure so far of cerebral differences between homosexual and heterosexual subjects,” says Ivanka Savic, who conducted the study at the Karolinska Institute in Stockholm, Sweden.
Previous studies have also shown differences in brain architecture and activity between gay and straight people, but most were based on…
