<span>Cro-magnons and Neanderthals were both humans but were different species of humans. Modern humans are descended from Cro-magnons but Neanderthals became extinct. Both existed during the same period of history. It is not known whether or not Cro-Magnons and Neanderthals interbred but it is a theory that Neanderthals became extinct from interbreeding with Cro-magnons and become "absorbed" by Cro-Magnons although I don't believe there is any genetic evidence to support this theory. Cro-Magnons resembled modern humans. Neanderthals had more sloped foreheads and larger ribcages and were stronger than Cro-Magnon. Cro-magnon had better tools, making the better hunters</span>
The emperor that attempted to reform Rome through its division in half and creating what was known as the Eastern and Western Roman Empire was Diocletian, he noted that it was impossible for an emperor to effectively rule over such a large empire.
<span>Immigrants from both periods were from eastern and southern Europe.</span>
