Diet and environment 1.2 million years ago revealed through analysis of dental calculus from Europe’s oldest hominin at Sima del Elefante, Spain - Hardy, Karen; Radini, Anita; Buckley, Stephen; Blasco, Ruth; Copeland, Les; Burjachs i Casas, Francesc; Girbal i Lladó, Josep; Yll i Aguirre, Errikarta-Imanol; Carbonell, Eudald; Bermúdez de Castro, José María (2017)