Real Life Jekyll and Hyde
... A rare sleep disorder, indeed Europe’s only recorded case, turns a mild mannered
70-year-old man into a foul-mouthed violent monster// at night.
Derek Rogers and his wife have ‘nightmares’ during the day, of the night to come....
Aggressive Teenage Behaviour: Blame It On The Anabolic Steroids
...der to analyze the effects of anabolic steroids, researchers injected the compound into adolescent hamsters and studied the behavioral changes. Mild mannered
hamsters were found to defend their territory through aggression in the form of play fighting, wrestling and nibbling, learnt during puberty.