Anxiety is only ever created by the body. I understand the experiment, but I don't understand what this headline is supposed to mean. I think somebody is lettin

Anxiety is only ever created by the body. I understand the experiment, but I don't understand what this headline is supposed to mean. I think somebody is letting their liberal arts leak into their science. External things don't cause anxiety. Anxiety often occurs as a reaction to external things. Of course anxiety might be caused by a faster heartbeat; one of the symptoms of anxiety is a faster heartbeat. You can also cause it with injections of adrenaline, or amphetamines. Lack of oxygen works, too. Maybe this seems profound because the mice can't explain their feelings?