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The moon has turned red in the skies above the Americas and the Caribbean at the start of a rare series of lunar eclipses. This is the first stage of what's known as a tetrad -- a sequence of four complete eclipses within two years. Dr EC Krupp is director of the Griffith Observatory in Los Angeles, which stayed up all night for the event. (Photo: The moon is seen during a total eclipse in Buenos Aires on April 15, 2014. Photo: JUAN MABROMATA/AFP/Getty Images)