回复：被7岁儿子的一个问题难住了

来源: 于 2012-08-16 14:55:17 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

Stephen has an lecture about origin of universe

http://www.ralentz.com/old/astro/hawking-1.html

 

interesting website that discuss physics

http://www.physicsforums.com/showthread.php?t=79248