Scientists use gene therapy to control fighting and sex

You control your urges for violence and sex using a tiny tangle of neurons located in a very ancient part of your brain. Now it turns out that this knot of nerves, located in the hypothalamus, can be controlled with a new gene therapy technique that uses flashes of light. What this means is that scientists may be on… » 2/09/11 4:00pm 2/09/11 4:00pm