Every indexed document

certain aspects of our capacity to harm others emerges as an

” which is used to provide a warm massage. Several massage

” she said in describing her situation in

” she recalled in an interview with a Vogue

Snowden was still reading and assessing the files he had

writes that the ant battles were “deadly combat ... without any noise... I never

each side lined up in strategic formation

as well as the mechanisms that evolved to make it possible.

making the kill relatively cost-free. Rare in the animal kingdom are cases where

but he effectively reboots the female’s sexual

situations in which adults kill infants. Infanticide is often committed by

but designed to kill prey species for the purpose of survival.

version 1.5: upgrade to lethal aggression

the link between harm and reward was upgraded to a capacity for lethal aggression.

have elevated levels of testosterone and dopamine.

a place to revisit. Drug abusers and gamblers

the location associated with the injection becomes tagged as a favorite spot in the

and humans become addicted to it. If you inject testosterone into a mouse while it

testosterone is also directly linked to the reward system. Mice will work a response lever

and ramping up dopamine to add to the already reinforcing properties of testosterone. But