Efforts to uncover more about Earth’s interior—and specifically to penetrate Earth’s crust—have, as yet, been unsuccessful, meaning that scientists have a tremendous amount of work ahead of them. The deeper scientists dig into Earth (which so far, isn’t very far at all), the more they realize that many of their assumptions about Earth’s interior are false, further showing how limited our knowledge is. Moreover, the more humans uncover, the more threats to our safety we discover (such as kimberlite pipes), which shows that humans and all the other species living on Earth’s surface are even more vulnerable than we may ever know.