Killer Whales are actually more closely related to dolphins, not whales.
We've all heard that you shouldn't wake someone who's sleepwalking, but it's actually safer to gently wake them up and guide them to safety.
Ostriches don't bury their heads in the sand when they're frightened, they actually just play dead.
There are four states of matter, not three: Solid, liquid, gas and plasma.
The sun isn't going to explode in 4 billion years, but rather expand and swallow anything nearby.
Another common misconception is that your everyday house fly only lives for 24 hours, when in actuality can stick around for up to a month.
Black holes aren't black. They're only perceived as dark because they emit no visible light.
Drinking 8 glasses of water is probably good advice for some people, but it should not be followed as a rule. Moreover, nobody is really even sure where this advice originated. Just remember, if you’re thirsty, drink.
Contrary to what you may have heard at your local dietary supplement retail outlet, sharks do get cancer. There is nothing special about their cells and researchers have been studying cancerous tumors on sharks for years. So, next time you’re about to buy those cartilage pills, call the bluff.
You cannot develop arthritis from cracking your knuckles, so get to crackin'.
The center of the Earth is actually an extremely dense sphere of iron and nickel, not molten lava.
The myth that a penny would kill someone if dropped from the top of the Empire State building is just simply false.
Despite being the closest to the sun, Mercury is not the hottest planet, Venus is. It has a surface temperature of 864 degrees Fahrenheit.
Vikings didn't sport horns on their helmet. While helmets have been discovered with horns and wings, they were designated for priests to wear during ceremonies.
Though it is referred to as a 'banana tree', the stem doesn't contain true woody tissue. In reality it's actually a herbaceous plant, or 'herb'.
As much as your English teacher might not like it, 'irregardless' is a word. It's considered non-standard and most people would prefer to use different forms of the word, but it is in fact a legitimate word.
Poinsettias are not lethal. The toxic properties of this plant have been highly exaggerated. While you should keep your pets away from them, they are not as poisonous as you're led to believe.
Hydrogen peroxide does not help wounds heal. The bubbling you see is more than likely the hydrogen peroxide attacking you. It's also known to cause cellular damage and extends the healing process.
Tomatoes aren't vegetables, they are a fruit.
Dogs don't sweat through their tongues, they actually have very few sweat glands. When dogs get worked up they tend to pant, but that is not the same thing as sweating.
Bats are not blind, and actually do pretty well for themselves despite having limited vision. While many species use predominately echolocation, bats can still see in black and white.
It's common knowledge that Chameleons change colors but the reason for it is slightly more elusive. While most believe it is so that they can blend in with their surroundings, the primary reasons are to regulate their temperature or communicate with other chameleons.
Seasons aren't caused by the distance of the Earth from the Sun. In actuality, they are caused by the 23.45 degree tilt of the Earth's axis, which causes certain parts of the Earth to be more oriented towards the sun.
Goldfish have a pretty decent memory, despite being pegged for only having 3 second one.
So a ducks quack won't echo? Go to a grocery store, buy some bread, find a lake, bait some ducks, catch one, release it under a bridge. If you do this correctly you will see why this myth is false.
Via list25 and ViralNova