How deep is the deepest part of the ocean?

Whoa, look at this! We're dive-in' all the way down to see the hidden parts of the ocean. Way up top is the Sunlight Zone, where the water is warm and bright enough for all the colorful fish to play. But as we go deeper, we reach the Midnight Zone! It's super dark here because the sun's light can't reach this far down—only glow-in-the-dark creatures live here. Now, check this out! If we put Mount Everest—the tallest mountain on land—into the water, it wouldn't even reach the bottom! That mountain is HUGE, but the ocean is even HUGER. Further down, we find the Mariana Trench. It's like a giant, rocky V-shaped valley hidden on the ocean floor. And right at the very, very bottom is the Challenger Deep. It's almost seven miles down! That's the deepest spot on Earth, where only special submarines can go. It's a long way down! Tiny Concepts.