量子物理学家探究宇宙神秘的时间之箭

物理学家与哲学家长期以来一直在探讨时间的本质及其单向流动的特性。英国物理学家Jim Al-Khalili在其新书《On Time》中，针对这些关于时间的深奥问题提出了自己的见解。

Scientists and philosophers have argued over the nature of time since … well, since time immemorial. Is time real, or is it a convenient illusion? Why does time seem to flow in just one direction? In a new book called “On Time,” British physicist Jim Al-Khalili lays out what he thinks is the answer to such questions.