![]() ![]() Sometimes they are islands and other times they are connected to land at one end, a feature dubbed a “spit.” Scientists estimate that there are more than 2,100 barrier islands in the world fronting nearly 10 percent of continental shorelines. ![]() These strips of land are usually long and narrow and run parallel to the mainland. The prime example of beach evolution is the coastal barrier. ![]() When you look across decades and centuries, you see the landscape evolving on a wider scale, but still one that humans can experience. Spend a year, and you see dunes grow, shrink, and migrate. Spend a week, and you see sandbars and wading pools arise and disappear. Spend a day on the beach and you see the micro scale - in the grains of sand blown by winds, tumbled by the surf, or carried out in your shoes. ![]()
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