Murderers May Be Hardwired to Kill

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Murderers May Be Hardwired to Kill         Two mutated genes help explain why most violent crimes are committed by a small group of antisocial, repeat male offenders. Read More WATCH VIDEO: Murder Is Infectious Murder might just work in the same way than an infectious disease does. Bird Feather Tech Smooths Out Bumpy Flights         A new sensor system mimics the way feathers help birds detect disturbances. Read More WATCH VIDEO: Why Some Birds Don't Have Penises Most birds don't have them, but it wasn't always this way. So what happened? When Spirits 'Dictate' Books: What's to Believe?         Many popular books are claimed to have been written by the dead through psychics. Read More WATCH VIDEO: Can You Literally Be Scared to Death? Can you actually die from being "scared to death" by something freak-out-worthy? Eyes vs. Cameras: How They See Things         Is a camera just a human eye by another name? We take a look at what each of these complex devices can and can't do. Watch Follow Discovery News on Facebook! Get your sci-tech headlines all day on Twitter too! Follow us @Discovery_News. At Discovery we value your privacy. If you would like to be removed from Discovery News emails like this, please click here to our subscription center, where you can manage your account. We recently updated our privacy policy. This policy is effective as of 10/30/07. To see new policy click here . Discovery Communications, LLC One Discovery Place Silver Spring, MD 20910 © 2014 Discovery Communications, LLC