It is a curious 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，根据从生物学或地球物理学的角度出发，对地球史前条件会得出完全相反的结论，这反映了我们目前知识的不完整状态。
时间存在的唯一理由是让一切不会同时发生。
儿童的一切教育都必须遵循一个原则，即帮助孩子身心自然的发展。
统计学是从经验中学习的科学，尤其是从他人的经验中学习。
"The present is a fragile bridge between the past and the future, and we are all just trying to cross it without falling."
