I find it heartening that recent research suggests Neanderthals and modern humans interbred http://news.bbc.co.uk/1/hi/sci/tech/8660940.stm It is a wonderful image of ‘unity in diversity’ unlike previous theories of conflict between the two groups. It brings to mind the words of ‘Abdu’l-Bahá
Consider the flowers of a garden. Though differing in kind, color, form and shape, yet, inasmuch as they are refreshed by the waters of one spring, revived by the breath of one wind, invigorated by the rays of one sun, this diversity increaseth their charm and addeth unto their beauty. How unpleasing to the eye if all the flowers and plants, the leaves and blossoms, the fruit, the branches and the trees of that garden were all of the same shape and color! Diversity of hues, form and shape enricheth and adorneth the garden, and heighteneth the effect thereof.