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...$The big think:飞向无垠太空,或是退回混沌之海。$我们可以在这些冒险中停下,但是那会让你背弃数十亿年的进步,背弃数百万年的人类进化,并开始滑向斜坡,最终止于“原始的海洋”。$看的版本翻译有点问题,为啥不是马斯克来聊$泪流满面。$如果生命只存在于地球之上,那将非常令人惊讶