Argentine palaeontological technician Guillermo Aguirrezabala shows a fang inserted on a rock, part of the last finding of an Elasmosaurus --a species that became extinct 70 million years ago-- in Santiago, on April 12, 2024. Paleontologists work in a hurry before the tide rises on a beach on the central coast of Chile. They are rescuing the fossil remains of a unique marine reptile that lived 70 million years ago, a treasure for scientists. (Photo by RODRIGO ARANGUA / AFP)