Why Earth Has Two Levels
From the tip of Mount Everest to the bottom of the Mariana Trench, elevations on Earth span more than 65,000 feet. These elevations are actually super rare and the vast majority of our planet’s surface falls somewhere in the middle.
Earth’s outer shell is made of two materials, whose different densities and thicknesses give rise to the different levels. And if you wanted further proof, draw the Earth’s elevation on a graph and you get two distinct humps–two levels. Here’s more from MinuteEarth.
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