http://bit.ly/YJKCG6
http://narutobase.net/manga/Naruto/619/15
The recent chapter explain the reason how they obtain their uchiha obtical powers.
If one knows despiar or the lost of a love one- they will obtain Ms/ sharigan.
Sauske lost his who clan and his dear parents by his own...
Well incase the pictures does not shows this is the chapter when the discuss how he manage to escape death..
http://www.narutobase.net/manga/Naruto/363/14
Im not sure if anyone has post this already but im just curisous . Just want to know more of what ya think. Please dont blast me about this...