Top 10 Lies We Learned In School

Top 10 Lies We Learned In School

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We all learned a lot of stuff in school that we later realised was not exactly true. This begs the
question: were we lied to deliberately or did our teachers not know any better? Most likely, we
will never know the answer to that. Here are the Top 10 Lies We Learned In School. Be sure
to watch to the end, as this will be an exciting and revealing ride.
Before we dive in, don’t forget to like this video and subscribe to our channel.
10. THE GREAT WALL OF CHINA IS THE ONLY MAN-MADE STRUCTURE THAT CAN BE
SEEN FROM SPACE
It is crucial that we understand that while man-made structures like the Great Wall are visible
from satellites orbiting Earth, they're not visible at all from, say, the moon. "The only thing you
can see from the moon is a beautiful sphere, mostly white, some blue and patches of yellow,
and every once in a while some green vegetation," Apollo 12 astronaut Alan Bean told NASA.
"No man-made object is visible at this scale." Moreover, the structures you can see largely
depend on the weather and how far from our planet you actually are. In 2003, a Chinese
astronaut even admitted he couldn't see the Great Wall from space because the weather
conditions weren't right. Given the proper conditions, astronauts in the International Space
Station can also see major cities, the Great Pyramids of Giza, and some big bridges from
space.
9. DEOXYGENATED BLOOD IS BLUE
It is commonly believed that oxygenated blood is red and deoxygenated blood is blue. Could
this be because arteries are drawn red in textbooks and veins blue? Could it be that people
have taken this to be a guide to their actual colour? Regardless, this belief is inaccurate.
While glancing at your skin, you may be led to think that the veins below the surface carry
blood that is a different colour besides red. It has to do with the way tissue absorbs, scatters
and reflects light. This also explains why your lips look blue when you get cold. But if you
were to open one of your veins, or cut your lip, even when you're cold, there'd be nothing blue
at all about the liquid that would pour forth. According to a medically reviewed article, blood
that leaves the heart is full of oxygen, and therefore bright red, while blood that travels to the
heart is dark red. Even though your veins might appear blue, green, or purple, the blood that
flows in them is red. Well, that is, unless you’re an octopus, leech, or marine worm or some
other creature with blood that is one of those hues.
8. HUMANS ONLY USE 10% OF THEIR BRAINS
This myth’s origin is unclear, but the idea that humans are storing approximately 90 per cent
untapped abilities in the brain is not accurate. Scientists have repeatedly been outspoken
about this false claim, which has also been perpetuated by movies like "Lucy" and "Limitless."
All the neurons in your brain may not be firing simultaneously, but that doesn't mean that parts
of your brain are totally inactive. In the words of Barry Gordon, a neurologist at Johns Hopkins
School of Medicine, "It turns out though, that we use virtually every part of the brain, and that
[most of] the brain is active almost all the time. Let's put it this way: The brain represents 3%
of the body's weight and uses 20% of the body's energy." That is the best explanation for this
if ever there was one.
7. BATS ARE BLIND.
You've probably heard someone use the phrase "blind as a bat" to describe someone and
undermine their sense of sight. Contrary to this widespread belief, bats are not blind. Their

eyesight is actually better than most of ours. According to Rob Mies, executive director of the
Organization for Bat Conservation, large bats "can see three times better than humans." In
addition to a normal sense of sight, bats rely on a technique known as "echolocation" at night.
In low-light environments, as the term "echolocation" suggests, they can locate the source of
sounds based on echoes that are produced. This is particularly helpful when trying to find
prey and other food sources. So maybe the next time someone says you're "as blind as a
bat," you might want to correct them or take it as a compliment.