
Scientists have known for years that the Toxoplasma parasite caused changes in the brains of mice that made them lose fear of cats and thus become easy prey.
Now, however, new research by graduate student Wendy Ingram at the University of California, Berkeley, has found that the parasite causes a permanent loss of fear.
Has the parasite crossed over from the mouse to the human type that most resembles it? Or is the rat the actual rodent counterpart of the American Liberal?
http://www.seattlepi.com/national/article/Scientist-Parasite-creates-fearless-mice-4827184.php