Link (via Scientific American) -
Three years ago Frederick Kingdom, Ali Yoonessi and Elena Gheorghiu of McGill University noticed that two identical side-by-side images of the Leaning Tower of Pisa appeared to lean at different angles.
Link (via Scientific American) -
Three years ago Frederick Kingdom, Ali Yoonessi and Elena Gheorghiu of McGill University noticed that two identical side-by-side images of the Leaning Tower of Pisa appeared to lean at different angles.
