Scientists have outlined their best explanations for a mysterious feature dubbed the "magic island", which has been spotted on Saturn's moon Titan. The Cassini spacecraft captured the "island" during a flyby, but it had vanished by the time of the next pass. The bright splodge is seen in Ligeia Mare, one of the seas of methane and ethane found at Titan's north pole. Icebergs, waves and gas bubbling up from the sea bed are all possibilities, the scientists say. The study by an international team has been published in the journal Nature Geoscience. via BBC News.