What do you mean by poorly grown? A robust neanderthal skull can handle injuries from megafauna better. Our better strategy (potentially through more developed

What do you mean by poorly grown? A robust neanderthal skull can handle injuries from megafauna better. Our better strategy (potentially through more developed language), finer weapons, and slightly better ballistic aim combined to make us the better hunter. The evolutionary pressure for robust facial structure was not there - we evolved in a hot environment where a more lithe body was better adapted to long-distance persistence hunting. Also, GATTACA is a gem of a movie.