Great Wall of China protected from erosion by coat of lichen and moss

Much of the Great Wall of China is covered in a biocrust of lichen, moss and cyanobacteria – it turns out this isn’t slowly destroying the wall, as was previously thought, but is slowing its degradation

​Much of the Great Wall of China is covered in a biocrust of lichen, moss and cyanobacteria – it turns out this isn’t slowly destroying the wall, as was previously thought, but is slowing its degradation Much of the Great Wall of China is covered in a biocrust of lichen, moss and cyanobacteria – it turns out this isn’t slowly destroying the wall, as was previously thought, but is slowing its degradation