Make Me Smarter #4: All of the water on Earth would form a ball that’s 860 miles wide.
About 71 percent of the surface of the Earth is covered with water. However, it’s hard to fully grasp just how much water that actually is. Thankfully, NASA put it in perspective. They explain that if we were somehow able to take all of the water on the planet and bring it together, it would form a massive 860-mile wide ball. For comparison, the Earth itself is 7,917.5 miles in diameter.