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Re:How Ancient Humans Reached Remote South Pacific Islands by chetanahuja on Wednesday November 02, 2016 @03:42PM (#12858559)
"Islands leave distinctive cloud formations in their wake"

Only islands with high peaks, which means most likely, volcanic islands. Which happens to be true for large islands in the pacific. As opposed to purely coral islands which rise just above the sea level.

Re:How Ancient Humans Reached Remote South Pacific Islands by ararar on Wednesday November 02, 2016 @10:45PM (#12861240)
Very true. However, flat, forested islands can reflect a greenish color onto whatever clouds might be above them.
Re:How Ancient Humans Reached Remote South Pacific Islands by Pica_soO on Wednesday November 02, 2016 @04:13PM (#12858802)
The volcanic islands tend to form pearl-chains... one making a law from the faultlines, can follow that line