4 ms·

There is very little erosion in the desert, unlike in cities, where acid rain and humidity will break down even the hardiest rocks.

• frogpelt 8y ago
  What about sand + wind?
  • nkrisc 8y ago
    That's what I was wondering. The entire monument doesn't need to be eroded, only the fine etching. Would the best way to preserve it actually be to allow it to be buried in sand?