When evolution skeptics want to attack Darwin's theory, they often point to the human eye. How could something so complex, they argue, have developed through random mutations and natural selection ...

Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like individual fingerprints, making our eyes two of the most distinctive parts ...

The human genome carries instructions for ... of cataracts — an eye disease that clouds the lens of the eye — is triggered by mutations in genes for beta-crystallin proteins, which normally ...