Wait, I definitely remember reading about this in science magazines years ago: the earth's core is more like solid than liquid because it's under tremendous pressure from gravity, and it's spinning, and it's iron, which is why Earth has a magnetic field.
Is the new discovery that there is actually a fifth layer, which is solid, and that what we previously thought of as the "core" is actually liquid and not the innermost layer?
Is the new discovery that there is actually a fifth layer, which is solid, and that what we previously thought of as the "core" is actually liquid and not the innermost layer?