There have been different kinds of homo on earth until rather recently, making us a melting pot of them, showing it is impossible to speak of races, but each single individual is very different.[0]
According to some scholars like the anthropologist John Hawks[1] , the development is now more in the inside, like hormones, the lifespan, the functioning of the brain, immunesystem and so on.
It is said by some like Jonathan Pritchard [2] that we are diversifying in different directions on earth.
What do you think about our next Evolutionary step? - Where will future lead us to? - Do you have examples? - What does this mean for medicine and the sciences?
[2] http://www.zeit.de/2009/02/N-Darwin-Zukunft
[1] http://www.nbcnews.com/id/29123062/
[0] Thomas Heise (2016) Kulturen der Menschheit: Woher und wohin? Transdisziplinäre Perspektiven unserer Vergangenheit. ISBN 978-3-8260-5973-5.