All blue eyes descend from a single common ancestor who lived

Eye color percentages around the world and what causes eye color

Eye color - Wikipedia

Blue Eyes: Prevalence, Advantages, and Disadvantages

All blue-eyed people may have descended from a common ancestor that mutated about 10,000 years ago - GIGAZINE

Eye color percentages around the world and what causes eye color

What Causes Different Eye Colors? – Schenectady NY

Evolution of the Eye

Will blue eyes eventually become extinct or more rare? - Quora

Do all blue eyed people share a common ancestor? - The Tech Interactive