The researchers explained that the study demonstrated when we are in a novel environment the brain partly remains alert so that humans can defend themselves against any potential danger.
Aggression is a kind of innate survival mechanism, an instinct for self preservation, that allows animals to defend themselves from threats to their existence.
The INS should pay more attention to serving the millions of ordinary Americans who rely on the nation's border security to protect them from terrorist attacks.
Indeed, it is curious how instinctively one protects the image of oneself from idolatry or any other handling that could make it ridiculous, or too unlike the original to be believed in any longer.
I am going to mobilise public opinion sufficiently to bring to the very top of the nation's conservation agenda the severely endangered species I have in mind.
As the match began, I was alarmed to see that the other team was wrestling without headgear, a kind of light helmet designed to protect a wrestler"s ears.