Locked in an embrace, the mummified remains may end a 55-year mystery of what happened to climbers buried in an avalanche on Mexico's highest mountain. And their clinch shows how they must have huddled together against the cold, hoping against hope for rescue. An expedition in the central state of Puebla to rescue the two bodies was launched when a climber attempting to reach the top of Pico de Orizaba - which at 18,405ft is Mexico's highest peak - slipped and spotting a desiccated head and arm sticking from the snow. As two members of the expedition began to dig...