US astrophysicist Ron Mallett has spent decades trying to crack the mystery of time travel in the hope of revisiting his past, and now he thinks he's cracked the science that would make it possible.
원문출처 : https://www.cnn.com/travel/article/time-travel-ron-mallett-scn/index.html
원문출처 : https://www.cnn.com/travel/article/time-travel-ron-mallett-scn/index.html