 Could we assume then that the Earth's rotation has been similarly impacted at other points in its history? That's a great question. I mean, yes. So the changes that we're seeing in Earth, yes, obviously there has been ice age, you know, not ice age. The amount of ice on Earth does change. And, you know, part of it actually is, this is a bit technical, but, you know, from the last ice age, you know, our...