A lesson learned by centuries of beachcombers has been distilled to a physicist’s formula: to make the perfect sandcastle, use eight parts sand to one part water.

While it deals with sandcastles, it could also help determine the stability of retaining walls and the material they hold back.

Read (Reuters)

So, that’s why my sandcastles never amount to much – too much sand and not enough water. Remember – 8 parts sand and 1 part water.