 In the late nineteenth century , José <unk> y Serrano described a colossal head as having " Ethiopian " features and speculations that the <unk> had African origins resurfaced in 1960 in the work of Alfonso <unk> <unk> and in the 1970s in the writings of Ivan van <unk> . Such speculation is not taken seriously by <unk> scholars such as Richard <unk> and Ann <unk> . 
