Question

老师好，请教一个英文阅读理解的问题

Not even Charles Darwin’s theory, though it created more of a stir than Big Bang
cosmology, had such shattering implications for our conceptions of the nature of our reality. Yet it is
not significant because it introduced the question of the nature of what lies beyond Man’s grasp. A
tremendous number of megalithic ruins, including the Pyramids both of Mexico and Egypt,
Stonehenge, and others, indicate that this question has been foremost on humankind’s collective
mind since time immemorial. Big Bang cosmology is so incredibly significant in this line of
reasoning exactly because of the degree to which it changed the direction of this generally held,
constantly pondered, and very ancient train of thought.

其中“ this question ”指代的是什么问题，请老师解释下。
“Yet it is not significant”其中it 指代的是什么？“Big Bang cosmology is so incredibly significant in this line of reasoning” 其中“this line of reasoning”指代什么？谢谢老师

Answer 1

我认为“ this question ”指代的是conception of the nature of the world即the question of the nature of what lies beyond Man’s grasp.
“Yet it is not significant”其中it 指代的也是conception of the nature of the world
“Big Bang cosmology is so incredibly significant in this line of reasoning” 其中“this line of reasoning”意思是 这样的思路、这样的推理方法

Answer 2

this question 指代的是the nature of what lies beyond Man's grasp.
"Yet it is not significant"其中的it指的是Charles Darwin‘s theory