Why Do Wild Cats Have So Many Different Eye Colors?Wild cats exhibit a surprising diversity of eye colors, which researchers link to evolutionary changes in melanin levels.
Can Stress Really Make Your Hair Go Grey?Grey hair onset is mainly genetic, usually appearing from the twenties to fifties, with a rapid increase between ages 50 and 60.
The Big City Is Vibrant. Birds There May Be Getting Less So.Urban birds have duller plumage due to pollution, impacting their coloration and survival mechanisms compared to rural birds.