The Genetic Truth Behind Tongue Rolling (It’s Not as Simple as You Learned in School)
Tongue rolling is one of the most famous classroom genetics demonstrations of all time. Curl the sides of your tongue up into a tube shape, and if you can do …
Why Some People’s Eyes Water More in the Wind or Cold
Step outside on a genuinely cold or windy day, and some people’s eyes barely react. Others start tearing up almost immediately, streaming enough to blur their vision and leave them …
Why Some People’s Fingers Wrinkle More in Water
You’ve probably shared a bathtub, pool, or long dish-washing session with someone whose fingers stayed almost completely smooth while yours turned into full-on raisins. Same water, same amount of time, …
Why Some People’s Hair Turns Gray Early
You spot your first gray hair and immediately start mentally cataloging every stressful thing that’s happened lately, a tough semester, a demanding job, a rough year. It’s a satisfying story, …
The Genetics of Straight vs. Curly Eyelashes
Some people wake up with lashes that curl up and out on their own, no mascara or eyelash curler required. Others have naturally straight lashes that point almost directly forward …
The Genetics of Male Pattern Baldness (Yes, It’s Mostly From Mom)
Guys tend to eye their fathers nervously, watching the hairline for clues about their own future. If Dad’s still got a full head of hair at sixty, that feels like …
The Genetic Reason Some People Are More Ticklish Than Others
You’ve probably met both kinds of people: the ones who can’t have their feet touched without dissolving into laughter, and the ones who seem almost immune, barely reacting no matter …
Why Some People Get Goosebumps From Music
A song builds to just the right moment, a voice cracks with emotion, or an orchestra swells at exactly the right second, and suddenly your arms are covered in goosebumps, …
The Genetics of Hair Whorl Direction (Clockwise or Counterclockwise?)
Look at the top of almost anyone’s head, and you’ll notice their hair spirals outward from a single point, called a whorl, in either a clockwise or counterclockwise direction. Most …
The Genetic Reason Mosquitoes Prefer Some People Over Others
Every outdoor gathering seems to have one. The person who’s covered in bites by the end of the night while everyone else walks away completely untouched, despite sitting at the …