Curiosity Finds a Weird 'Ball' on Mars

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Curiosity Finds a Weird 'Ball' on Mars         Is that a tiny cannonball on Mars? Nope, but it is a fascinating object all the same. Read More WATCH VIDEO: Meteorite Reveals Secrets of Mars' Past A rock found its way from Mars to a desert in northwest Africa. Greek Tomb's Female Forms Hint Olympias May Lie Within         The female statues guarding a tomb in Greece may suggest that Alexander the Great's mother lies there. Read More WATCH VIDEO: Discovering The 'Cave Of Forgotten Dreams' Imagine a cave filled with the oldest human-painted images, dating back over 32,000 years. Mysterious Fruit-Like Animals Lived Long Before Dinos         The animals, whose remains resemble dried up pomegranates, lived 370 million years before the first dinosaurs. Read More WATCH VIDEO: The Dinosaurs You Love Are Fake Get the details on the fates of our most beloved dinosaurs. Can a Blood Test Diagnose Depression?         A small-sample study reports promising results in the use of a blood test to diagnose the disease.  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