state two ways which neanderthals and cro magnons differed list important achievement each t

State Two ways in which Neanderthals and Cro-Magnons differed.                        

List an important achievement for each of these scientist. Aristarchus, Euclid, Archimedes, and Herophilus

“Civilizations” is defined as the stage of development in which people have developed :
1. large, permanet communites.
2. a system of writing
3. divirsion
4. trade
5. a srtong central goverment