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Unbelievable Ocean Facts

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For thousands of years, oceans have captured people's imaginations. Their endless depths and mysteries remain an object of fascination to this day and we guarantee, you won't be feeling any less awe-stricken after checking out this list. Keep reading to learn some of these incredible and terrifying facts they never really talked about back in school:

1) The Average Ocean Depth Is 2.3 Miles:

According to NOAA, the average ocean is about 2.3 miles deep. That doesn't seem that impressive, right? Well, you're wrong. That is about the same as stacking the world's tallest building, Dubai's 2716-foot-tall Burj Khalifa, on top of itself nearly five times.

2) The Deepest Is About 3 Times Deeper:

Located in the Pacific Ocean's Mariana Trench near Guam, The Challenger Deep is the deepest known part of the ocean. It is about 6.8 miles deep, or 36,200 feet. In other words, it is nearly 18 times taller than Dubai's Burj Khalifa.

3) ...But We Don't Even Know If That's The Deepest For Sure:

What makes things even more mind-boggling? Humans haven't even explored 95 percent of the ocean, so it's possible there are far deeper oceans out there.

In fact...

4) In Some Ways, We Know More About The Solar System Than The Ocean:

According to NASA, we actually have better maps of planets than of the Earth's ocean floors. That means not only do we really know how deep it goes, we barely have scratched the surface about what else those waters may be hiding like…

5) Volcanoes Bigger Than England:

In 1971, humans found out the largest volcano in the solar system is on Mars. It took us a couple more decades to find the largest volcano on Earth. In 2013, a team led by University of Houston professor, William Sager, found the Tamu Massif located deep in the Pacific Ocean, reports the University of Houston. It's not just bigger than England; it spans across an area about the size of the entire United Kingdom. While it's thankfully extinct, you can't help but wonder how many others like it are out there...

6) Especially When You Read This:

Finally, for the most mind-boggling fact: there is a reservoir of water in the Earth's mantle three times as large as all previously known oceans, New Scientist reports. And guess what? We only just found it in 2015! Despite the fact oceans we've been able to see have been around since before humankind, we barely know much. Can you imagine how little we know about this reservoir? What if there's more!? Ah, we can't take it.