Crystal skulls 'are modern fakes'

Two of the best known crystal skulls - artefacts once thought to be the work of ancient American civilisations - are modern fakes, a scientific study shows.

They are at the centre of the story for the latest Indiana Jones film.

But experts say examples held at the British Museum in London and the Smithsonian Institution in Washington DC are anything but genuine.

Their results show the skulls were made using tools not available to the ancient Aztecs or Mayans.