I see that you are still unable to name any of these scientists.
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The hominins found in Sima de los Huesos were dated with a variety of techniques: “In 2014, excavators Arsuaga et al reported new dates from a suite of different dating techniques, including Uranium series (U-series) dating of speleothems, thermally transferred optically stimulated luminescence (TT-OSL) and post-infrared stimulated luminescence (pIR-IR) dating of sedimentary quartz and feldspar grains, electron spin resonance (ESR) dating of sedimentary quartz, combined ESR/U-series dating of fossil teeth, paleomagnetic analysis of sediments, and biostratigraphy. Dates from most of these techniques clustered around 430,000 years ago.”