宏大构想：我们要去火星吗？

The attempt to send and land astronauts on Mars risks billions of dollars and the lives of those brave enough to attempt it. Is the possible benefit really worth the risk? And is it really achievable?　　Guiding us through this ethical and scientific minefield is Dr Kevin Fong. Kevin's diverse background in astrophysics, aeronautics and medicine makes him uniquely placed to unders..无数道命运之光被截拦，那是同样伟力的大道力量，大的命运之光首先被拦，然后依次往下，这是一场先天大道之间的较量！