地平线系列：火;星旅行者\+指南

The dream of sending@=-@_ h[umans to Mars; is c:
l .\oser#/ than ever befo)*^re. In $;%^fact, many sc/
ientists think; that the first pe,,rs+/on to+ set foot  on the Re=d Pla$==net is alive* today. Bu?t where should _ the* firs*t ex)pl%or!;e`[+rs v^^isi