It is a strange fact, characteristic of the incomplete state of our present knowledge, that totally opposite conclusions are drawn about prehistoric conditions on Earth, depending on whether the problem is approached from the biological or the geophysical viewpoint.
一个奇怪的事实是，根据是从生物学还是地球物理学的角度来探讨问题，关于地球史前条件的结论完全相反，这反映了我们目前知识的不完整状态。
"Great art always carries within it great pain."