About 9000 years ago, the English Channel opened. Since then, Britain has been moving away from the European continent year after year. But not only the tides gnaw on the landmass - at least on the English side, a limpet snail on the chalk cliffs also makes amicable. Patella vulgata grazes the algae growth on the chalk banks off the cliffs. She also scrapes a lot of rock material. This was stated by researcher Claire Andrews of the University of Sussex, after having measured the lime content of the snail's snail for three years and determined the thickness of the excavated rock: According to their calculations, the limpets account for 30 percent of the total erosion at the chalk crates responsible. Considering that the Sussex region spends several million euros each year for coastal protection and thus for the preservation of the chalk cliffs, the table of each limpet is covered with a precious food.