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r\section{Introduction} \section{Introduction}  Our curiosity about Neanderthals has been increasing steadily during the last 20 years, with 2055 papers already published (12 papers in 1994; 215 papers in 2014; source: Scopus, accessed March 27th, 2015). Our current knowledge is becoming deeper in areas like chronology \cite{Hardy_2010, Gaudzinski_Windheuser_2014, Higham_2014}, ecology \cite{Stewart_2005, Finlayson_2007, Henry_2010}, population dynamics \cite{Trinkaus_1995, Premo_2008, Fabre_2009, S_rensen_2011, Bocquet_Appel_2013}, adaptive traits \cite{Sorensen_2001, S_rensen_2009, Rae_2011}, diet \cite{Stringer_2008, Richards_2009, Henry_2010, Hardy_2011}, technology and cognition \cite{Wynn2004467, Hardy201323, Fern_ndez_Peris_2012, Riel_Salvatore_2010}, genetics \cite{Pr_fer_2013, Briggs_2009, Sanchez_Quinto_2014}, and their relationship with anatomically modern humans \cite{Gibbons_2014, Sankararaman_2012,Banks_2008, d_Errico_1998}.