Intricate patterns in the tattoos of 1,200-year-old mummies from Peru were revealed using a new laser-based technique. But not everyone believes the new technique is better than existing methods ...

As a plane soars over the high desert of southern Peru, the dull pale sameness of the rocks and sand organize and change form. Distinct white lines gradually evolve from tan and rust-red.

McDowell, experienced in analysing fingerprints, confirmed that these prints did not match classic human patterns. The investigation took place in Peru in April, following a presentation of the ...