Argentine palaeontological technician Guillermo Aguirrezabala (R) works with colleagues following the last finding of an Elasmosaurus --a species that became extinct 70 million years ago-- in Algarrobo, Valparaiso region, Chile, on April 10, 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 PABLO COZZAGLIO / AFP)