Most of us grew up hearing little lies from parents, teachers, or friends that sounded completely believable. Some were meant to keep us safe, while others were simply passed down from generation to generation without anyone questioning them.
Although many of these myths have been debunked by science, they remain surprisingly common. Here are 15 lies almost everyone believed at some point while growing up.
1. Swallowed Gum Stays in Your Stomach for Seven Years
Nearly every kid heard this warning after accidentally swallowing a piece of gum. While gum isn’t easily digested, it doesn’t stay in your stomach for years. It simply passes through your digestive system like other indigestible materials.
2. Cracking Your Knuckles Causes Arthritis
Parents often discouraged this habit by claiming it would damage your joints forever. While constant knuckle cracking may annoy the people around you, research has found no evidence that it leads to arthritis.
3. Sitting Too Close to the TV Will Ruin Your Eyes
This warning became especially popular during the era of bulky tube televisions. Sitting close to a screen may cause temporary eye strain, but it doesn’t permanently damage your eyesight.
4. Eating Carrots Gives You Perfect Vision
Carrots contain vitamin A, which supports eye health, but they won’t suddenly improve your eyesight or eliminate the need for glasses. The myth became widespread during World War II as part of British wartime propaganda.
5. Sugar Makes Kids Hyperactive
Birthday parties made this seem obvious, but studies haven’t consistently shown that sugar directly causes hyperactivity. Excitement, celebrations, and expectations usually play a much bigger role.
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6. Wait an Hour After Eating Before Swimming
Many parents insisted that swimming too soon after eating would cause dangerous cramps. While vigorous exercise after a huge meal may feel uncomfortable, there’s little evidence that swimming shortly after eating is unsafe for most people.
7. Coffee Will Stunt Your Growth
Countless children were told coffee would keep them from growing taller. Scientists have found no connection between moderate coffee consumption and reduced height.
8. You Only Use 10% of Your Brain
This myth has appeared in books, movies, and motivational speeches for decades. Brain scans clearly show that we use many different parts of our brain throughout the day, even while resting.
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9. Lightning Never Strikes the Same Place Twice
It sounds logical, but it’s completely false. Tall buildings, radio towers, and trees can be struck by lightning many times during the same storm.
10. Goldfish Have a Three-Second Memory
This myth has survived for years despite being thoroughly disproven. Goldfish can remember information for months and are capable of learning simple tasks and routines.
11. Shaving Makes Hair Grow Back Thicker
Many people avoided shaving because they believed the hair would return darker and thicker. In reality, shaving only cuts the hair at the surface, making the blunt tip feel coarser as it grows.
12. Touching a Baby Bird Will Make Its Mother Reject It
Parents often used this warning to stop children from disturbing nests. Most birds have a weak sense of smell and won’t abandon their chicks simply because a human touched them.
13. Reading in Dim Light Permanently Damages Your Eyes
Reading in low light can make your eyes feel tired and uncomfortable, but it doesn’t cause permanent vision damage.
14. Bulls Charge Because They Hate the Color Red
Bulls don’t react to the color red itself. They’re colorblind to red shades and actually respond to the movement of the matador’s cape.
15. People Swallow Eight Spiders a Year While Sleeping
Perhaps one of the most famous internet myths ever created. There’s no scientific evidence that sleeping people regularly swallow spiders, and spiders generally avoid humans altogether.
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