Our brains are large. In fact, they have an estimated surface area of 1.3 square feet. That is big! Hard to imagine huh?
 
 
The average human heart beats about 72 times per minute. That means that it will be at an average of 2.5 billion times in 66 year human life-span. Isn't it crazy how our bodies do this unconsciously. This is some cool stuff!
 
 
The color of a Polar Bears fur is not white, the color is... well, it doesn't have a color! "What?!" You might say. The fur of a polar bear is actually transparent. It has a white hue because of the reflection of the sunlight and the snow. In fact, some fur is actually turning green due to algae growth!

The skin of a polar bear is actually black! Now you might think that since their skin color absorbs more heat, but studies show that actually the white hair absorbs more ultraviolet light.

Now, one more fact about polar bears (this has little relevance to the title, but hey! This was interesting).
Underneath their black skin is a layer of fat that is 4.5 inches thick! When most animals have fat, it is used to prevent heat loss. But in Polar Bears, it is the fur that is meant to prevent heat loss. Studies show that because of their fur, they become overheated when they run! 

Some interesting facts about this bear!

 
 
How many of you guys used the word "nerd"?
It turns out that the word nerd is made up. It was first used by Dr. Seuss in 1950. This word only became popularized in the 70's when it was used A LOT in the sitcom "Happy Days". 

How so many of us thought Nerd was a real word...