Did gravity point time in the 'right' direction?

日期:2019-03-09 05:03:16 作者:巫马齿 阅读:

By Marcus Chown WHY does time flow forwards rather than backwards? Perhaps the answer to this long-standing mystery lies in what happened to the universe when gravity first took hold about 380,000 years after the big bang. We’ve known since the 19th century that entropy plays a role in the arrow of time. Eggs break rather than unbreak, coffee grows cold rather than hot, and people grow old rather than young. All these changes are associated with an increase in the entropy, or disorder,