First Sex Happened Between Square-Dancing Fish

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First Sex Happened Between Square-Dancing Fish         What was the first sexual intercourse like? A new study finds it involved fish and looked a lot like a square dance. Read More WATCH VIDEO: Why Do Fish Come In So Many Colors Fish don't ever seem to dress down -- they're as colorful as possible, always decked out. Why is that? Best-Ever Portrait of Alexander the Great Found?         The recently uncovered mosaic in a mysterious Greek tomb may be the clearest depiction of the famous ruler as a young man. Read More WATCH VIDEO: Discovering the 'Cave of Forgotten Dreams' Imagine a cave filled with the oldest known human-painted images, dating back over 32,000 years.  Tasty Tech Eye Candy: Photos         We picked 10 of our favorite design prototypes from the Red Dot Award Design Concept's Best of the Best winners. Read More WATCH VIDEO: How Wi-Fi Works on Planes Find out how travelers can access the Internet from 30,000 feet. What's the Military's Not-So-Secret Shuttle Doing?         It's not entirely a secret space shuttle, but there's still much we don't know about the Air Force craft that recently landed after a journey to space. 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