Body Invaders: Here’s 5 You Really DON’T Want

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5 Creatures You Don't Want Your Body to Host         These unwelcome guests can make life difficult for the human body. Read More WATCH VIDEO: How a Tiny Amoeba Can Eat Your Brain There's a single-celled amoeba lurking in lakes that can literally eat your brain! Manning's Sex Reassignment: Possible in Prison?         The convicted WikiLeaker wants to undergo sexual reassignment therapy; his case is likely to end up in court. Read More WATCH VIDEO: Men and Women Ain't So Different Men are from Mars, women are from Venus ... or are they? Optical Illusions: Your Brain Is Way Ahead of You         The tiny delay between light hitting the retina and the brain translating that into perception can play tricks on our mind. Read More WATCH VIDEO: Do I See Colors the Way You Do? Do you see color the same way as others? What about those who are color blind? Why We Sleepwalk: Video         We put to rest the question: Is it safe to wake a sleepwalker? 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 © 2013 Discovery Communications, LLC