Dogs Walked by Men Are More Aggressive

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Dogs Walked by Men Are More Aggressive         A dog's age, sex and size, as well as the owner's sex and use or not of a leash all affect canine behavior. Read More WATCH VIDEO: Cats Drink Differently Than Dogs The difference between dogs and cats just widened. A Laser to Give the Universe a Hernia?         Those pesky physicists are at it again; they want to build a laser so powerful that it will literally rip spacetime apart. Read More WATCH VIDEO: Chaplin's Time Traveler Explained Is that a time traveler chatting on a cell phone in an old Charlie Chaplin film from 1928? Bicycling Could Save Billions         If people chose to take half of their trips on two wheels instead of four, health care costs could drop by billions. Read More WATCH VIDEO: BMX Biker Breaks Laws of Gravity BMX rider Jed Mildon completed the world's first triple backflip on his bike, seemingly defying the laws of gravity in the process. First Known Europeans Identified         The earliest Europeans lived around 45,000 years ago and shared turf with Neanderthals. Read More WATCH VIDEO: Cool Jobs: Archaeologist Does archaeology really include globetrotting adventures filled with mystery, danger and romance? 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 © 2010 Discovery Communications, LLC