The ocean contains 99 percent of all of Earth’s living space
Wait, what happened to only 70 percent? Well, there’s a difference between the amount of the Earth’s surface covered by ocean (that’s 70 percent) and the total amount of space. With the depths of the oceans taken into account, the ocean comprises a whopping 99 percent of all habitable space on the planet. Despite all that open space, though, the ocean isn’t as populated as the land is, in part because the deepest parts of the ocean are inhospitable to all but a few life forms.
