Hello internet. So today, I want to share with you 10 common misconceptions I learned. If you want to learn more, you can follow this link to go CGP Grey's channel on youtube to learn many interesting things. Link:
http://www.youtube.com/user/CGPGrey
1. "The Great Wall of China is the only man-made object visible from space."
In order to view something visible from space, it would have to be pretty big. And the Great Wall of China certainly is. But it's only 30 feet across at its widest, so even a picture from the international space station, a lake is bigger. So you cannot view it from space. As for the "man-made" part, the man-made lights from cities and towns are visible from space.
2. "Cracking your knuckles causes arthritis."
Socially obnoxious? Yes. Gives you arthritis later in life as a punishment? No.
3. "You need 8 glasses of water per day."
You do need to drink water, but there are no scientific evidence that you need to drink 8 glasses per day, but some evidence say that 8 glasses are too much...
4. "Blood in veins are blue."
The idea here is that blood in veins are blue and only turn red when exposed to oxygen. The next time when you get blood drawn from your vein, what color is it? Red. Well, dark, maroonish red.
5. "An ostrich will stick its head in the sand when threatened."
Keeping in mind that ostriches are up to five feet tall, have long beaks and claws, and are aggressive, why would they hide? Sure, they will run away or hide from predators, but not in the stupidest way possible. When you threaten one, if you're lucky, they will run away at forty miles per hour. If your not lucky, then hope that it doesn't tear off your flesh before you fall unconscious from its nasty kicks.
6. "A mother bird will abandon her baby if a human touches it."
A mother bird will not abandon her baby if you touch it any more than a human mother will abandon her baby if a bird touches it. If you find one, put it back into its nest, the mother will not abandon it.
7. "Goldfish only have a memory of up to 7 seconds."
Goldfish can actually be trained and remember what they've learned for months afterwards.
8. "All bats are blind."
If you ever looked at a bat, they will look back right at you...with their eyes...which they use to see things...but they have an additional sense called "echo-location" which they use to navigate the world through darkness. So at night, to them, you are the blind one.
Interesting fact of the day: The carpenter ant, otherwise known as the exploding ant is pretty self-explanatory. When fighting with something and knows it will lose, they get as near as possible to its predator and voluntarily ruptures itself by compressing its abdominal muscles in on a poison gland so hard, it literally explodes itself, causing poison to splatter everywhere.