Mikeal Sandre

Here's another world fact to keep in the back of your mind: According to the Population Reference Bureau, since the time Homo sapiens first hit the scene 50,000 years ago, more than 108 billion members of our species have been born. And a large chunk of that number is alive right now. According to the bureau, the number of people alive today represents a whopping 7% of the total number of humans who have ever lived.

Not all bacteria are bad. In fact, some of those itty-bitty biological cells are actually good for us and aide the world in various and complex ways. And that's nice to know, considering there are around 4 quadrillion quadrillion individual bacteria on our planet, according to NPR.

Earthquakes can range from minor tremors that are barely noticeable to building-toppling ground-shakers that cause massive destruction. But it's an inevitable part of life for those who live in countries such as China, Indonesia, Iran, and Turkey, which are some of the most earthquake-prone places on the planet. However, according to the USGS, Japan records the most earthquakes in the world.