Some evolutionary psychologists believe that the latter is rooted in the universal fear of animals and an associated attempt to appease the beasts through emulation.

ECONOMIST: De facto Afghanistan

The next day the animals' fear of the tone had greatly diminished, indicating that the drug had prevented the old memory from being stored again.

FORBES: Oblivion in a Pill

The animals have no fear of humans, so your children will swim with dolphins and turtles and play near seals.

CNN: 10 places that can change your child's life

As a result, animals have little fear of humans.

BBC: Safari by water in southern Africa

Kids are less likely to fear wild animals, Willoughby says, and because of their small stature, they are more likely to be bitten in the face or neck, which means the virus can travel to the brain much more quickly.

CNN: Four shots enough to ward off rabies

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