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Sand Ripples

16 March 2024
Astronomy, Geology

At https://www.sciencedaily.com/releases/2024/03/240312133825.htm … scientists propose a new theory that explains sand ripples on Earth by comparing them to sand ripples on Mars. Sand ripples are symmetrical, unlike the wind that forms them. Israeli physicists, Hezi Yizhaq and Itzhak Katra, noted there were large ripples, at the metre level, and smaller ripples, at the decimetre level. Sand ripples on Mars were formed by the wind, it is thought, but look like sand ripples on Earth  caused by water – or the tide. No mention of electromagnetism.

At https://www.sciencedaily.com/releases/2024/03/240312133838.htm … we have a coral highway in the Indian Ocean – although it appears to mainly be in among the various Seychelles islands, with outliers in the direction of Africa. It is scattered across a million square km we are told, from the remotest of the islands in the Seychelles, and they seem to be related to one another. The larvae of corals are scattered by ocean currents which appears to explain why they are so alike. See the research at https://doi.org/10.1038/s41598-024-55459-x

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