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Um well actually, it's the other way around, we used to all only have brown eyes, but have evolved to blue, green and grey.
A few other small changes....
http://mentalfloss.com/article/30795/5-signs-humans-are-still-evolving
A few other small changes....
http://mentalfloss.com/article/30795/5-signs-humans-are-still-evolving