Natural experiments can provide valuable insights into economic questions.

Innovation in natural gas extraction is key to meeting the world's growing energy demands while reducing environmental impact.

"The universe is not only stranger than we imagine, it is stranger than we can imagine."

I was neat, clean, shaved and sober, and I didn't care who knew it.

物理学中的发现之旅不仅仅是寻找答案，更是提出正确的问题。