There are many myths science has already debunked, yet they still stick around. Let’s take a look at some of the most common ones.
We Only Use 10% of Our Brain
The truth is, we use our entire brain, though different areas become more active depending on the task.
Women’s Menstrual Cycles Sync Up
At work, you might hear that women who spend a lot of time together sync their periods. This myth comes from a 1971 study, but no further research has ever confirmed it.
The Great Wall of China Is Visible from Space
People often say the Great Wall of China is the only man-made structure astronauts can see from space, but that’s not true. While impressive, the wall is too narrow to be seen from orbit. However, wide highways and city lights on Earth’s night side are definitely visible.
People Are Either Left-Brained or Right-Brained
Some brain functions are hemisphere-specific—like language processing in the left hemisphere—but there’s no scientific proof that people are dominated by one side. Also, left-handed people aren’t necessarily more creative.
Animal Facts
- Bats aren’t blind—none of their species are—and fruit bats actually can’t echolocate.
- There’s no “alpha” wolf; wolf packs function more like families.
- Bulls aren’t angered by the color red, but by the matador’s threatening behavior and the stress and abuse they endure before the fight.
- Camels store fat, not water, in their humps.
- A cat’s personality isn’t linked to its fur color, ostriches don’t bury their heads in the sand, and goldfish have memories lasting several months—not just a few seconds.
Hair Grows Faster If You Cut It More Often
Cutting your hair doesn’t speed up growth, but it does help prevent split ends. Hair grows from the follicles at the scalp, which isn’t affected by trimming the ends.
The Tongue Has Four Distinct Taste Zones
We learned in school that the back of the tongue senses bitterness, the front sweetness, the sides sourness, and the middle saltiness—but that’s not true. Taste buds all over the tongue detect all flavors. Fun fact: receptors called “umami” are responsible for the savory meat taste.
Cracking Your Knuckles Is Unhealthy
Many find knuckle cracking annoying, but it’s not harmful to joints and doesn’t cause arthritis or cartilage wear. The popping sound comes from bubbles bursting in joint fluid—not bones knocking together.
Polygraphs Don’t Prove Anything
Lie detectors measure heart rate, blood pressure, breathing, and sweating. You might think that’s reliable, but polygraph results aren’t conclusive. Accuracy depends heavily on the operator’s skill, and with some practice, people can fool the machine. Innocent people can also be misjudged as lying due to stress from false accusations. Because of its high error rate, polygraph evidence isn’t accepted in court.
