Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

If you've ever looked into someone's hazel eyes, you know firsthand just how beautiful they are. With a captivating blend of green and brown with splashes of amber or gold, it's hard not to get lost ...

GOLD COAST: You're introduced to someone and your attention catches on their eyes. They might be a rich, earthy brown, a pale blue, or the rare green that shifts with every flicker of light. Eyes have ...

Add Yahoo as a preferred source to see more of our stories on Google. If you've ever looked into someone's hazel eyes, you know firsthand just how beautiful they are. With a captivating blend of green ...