article_snippet: Across the globe there are millions of 'letters' and 'numbers' hiding among buildings and in the landscape of the Earth.
article_snippet: People can search for letters either anonymously or by adding a credit name to the discoveries.
article_snippet: And People are added to a leaderboard as soon as People find more than ten letters.
article_snippet: People can search for letters (examples shown) either anonymously or by adding a credit name to the discoveries.
article_snippet: People are then added to a leaderboard as soon as People .
highlights_snippet: people then catalogue all the letters, numbers and characters people can find .
  