No one knew where they came from, they just appeared. They looked and felt like regular pebbles. All different colours, shapes and sizes, but all with the rounded edges and irregular shapes that pebbles have. No one even seemed to notice them arriving, presumably because of the remoteness of their initial appearance. For, you see, they simply appeared in deserts, windswept deserts, with scattered cacti here and there, and along mountain ranges where the hardiest of plants grew. Some even washed up on the shore, picked up by giggling children and thrown back in the sea, just like regular pebbles. These, however, were not regular pebbles. In fact, these were not pebbles at all.
By the time anybody realised, it was too late. The great pebble invasion had begun.
It started in Mexico, the first cactus to be devoured was a classic western cactus with the appearance of a drunk person waving and saying “Yoo Hoo!” The innocuous looking pebble, nestled in the sand at the base of the green spiky plant, just ate it, very quickly, with razor sharp teeth in powerful jaws.
Then, halfway up a particularly pretty hillside in the Dolomites it happened again. This time a grey pebble with white spots chopped down on a clump of sempervivums and sedums.
And it happened again, and again, and again. The world over, anywhere and everywhere that these hardiest of plants grew. The pebbles devoured the succulents, one tasty morsel at a time. And when the succulents where gone, they ate everything else, all the plants, exotic and common, sweet perfumed and smelly, they did not appear in the least bit fussy, across all the continents, throughout all the seas.
Everything that lived and grew was chopped and chewed and swallowed.
Except for sprouts, for some reason, they left all the sprouts.
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