DARMSTADT, Germany - A European space probe landed safely on the surface of Saturn's moon Titan on Friday, a space official said, buoying hopes the mission would produce data that could shed light on the origins of life on Earth. Officials were jubilant as early signals showed the probe powering up for entry, then beginning the 2 1/2-hour parachute descent during which it was to gather information that could shed light on how life arose on Earth. Mission controllers were confident the Huygens probe made a soft landing because it was still transmitting steadily long after it should have landed,...