Red is the rarest hair color, but to understand why that’s the case, you need a basic grasp of the science. There’s a lot ...

“It may seem like green is rare,” says Dr. Kaplan, “but there are many people who have green-brown eyes.” Just as the MC1R gene determines your hair color, a single gene, OCA2, is 75% ...

Eye contact helps build trust and communication whether in business, friendships or romantic pursuits. Its importance in human socialization means that we're more likely to take note of eye color and ...