Imagine waking up one day and finding that your beautiful local beach is no more—gone, its fine white sand swept away by an abnormal storm. You go about your daily business for 12 long years and then suddenly the beach is back, all its glory restored by another storm. This is what happened on the island of Achill, off the coast of Ireland, where people are celebrating the return of the beautiful Ashleam Bay beach that was taken from them in 2005.

    That in itself is unusual enough, but the story gets even better! You see, another beach in Achill did a disappearing act once, but took much longer to return. The beach at Doonagh, located only six miles away from Ashleam Bay, was restored earlier in 2016 after waves created by spring storms had swept away all the sand in 1984, leaving just rock pools behind.

    There is local legend that stretches back hundreds of years that says this beach at Ashlcam Bay returns for a short every seven years then disappears again. But this time around it took a bit longer than that. It was last seen in 2005 and it stayed for a few months at that time before it was washed away again.

    As you can imagine, everyone on the island of Achill is thrilled to have their sandy beach back, and even though no one knows how long it's going to be around for, they are making the most of the time they've got before it disappears again.

    Some may be quick to believe climate changes cause the phenomenon, but that's not the reason these two beaches in Achill keep disappearing, Dr Kevin Lynch, a geographer at NUT Galway, says that these occurrences are the result of hydrodynamics (流体力学) and sediment(沉积物) supply, rather than climate changes.

    Regardless of what's causing them, disappearing and reappearing beaches are just part of what makes nature so fascinating.