Buck's work has also widened to include pheromones: chemicals released by animals that act on members of the same species to stimulate responses like fear and aggression.

FORBES: Magazine Article

My symptoms are: the fear of killing people, the fear of harming people, hyper-vigilance, guilt, aggression, panic attacks.

BBC: NEWS | Programmes | Panorama | Tell us your story

They just fear that Mr Steinmeier wants to bury the fact of Russian aggression in a morass of moral equivalence.

ECONOMIST: Europe frets about its place in a different world order

Decades ago, the regime had been able to count on the population's fear and on its acceptance of the broad argument of resistance in the face of imperialist aggression.

CNN: Syrian isolation marks regime's nadir