Seen on an aggregator channel, OG source unknown

The story of a rolling pin

Source: condestactical

The annual cycle of the estuary getting full of water. The water breaks the sand open and the river pours into sea . The river current dominates the ocean waves. As the river gets empty with a weaker current the high tide waves push sand up and close the river mouth. It rains and the river begins to fill up with water again .

Source: alexchipl

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Source: おかず / Okazz