Why Did Blue Eyes Evolve?, Resource Center

Blue eyed people make up an estimated 8% of the population. In Northern Europe, blue-eyed individuals find themselves in the majority. How did this evolve?

Europeans had dark skin, blue eyes 7,000 years ago

The Genetics of Eye Color – HudsonAlpha Institute for Biotechnology

Blue Eyes: Prevalence, Advantages, and Disadvantages

Huge variety of eye colors in today's cats may trace back to distant ancestor's unusual peepers, Science

Why do some dogs have blue eyes? (5 causes + most common breeds)

Blue Eyes: Prevalence, Advantages, and Disadvantages

The Evolution of Pet Ownership

The complexities of the human eye

Evolution of the eye

Why the eye? - Understanding Evolution

What is the evolutionary reason for blue eyes, and is it still valid, or will blue eyes eventually become extinct? - Quora

Why Did Blue Eyes Evolve?, Resource Center

Everyone With Blue Eyes May Descend From a Single Human Ancestor