Complex sentence: There is considerable debate about whether Cro-Magnon people accelerated the demise of the Neanderthals, but the timing suggests that the developing behavior patterns of Cro-Magnon may have had considerable impact on the process.
Split into simpler sentences: There is considerable debate about whether Cro-Magnon people accelerated the demise of the Neanderthals. Timing suggests that the developing behavior patterns of Cro-Magnon may have had considerable impact on the process.