视频简介
Are we %alo ne in th; e($ universe? For .%@ove:/r half(; a cent*?u^ ry, legenda) \ry NASA !%engi%^# neer an_( d [best-selling scien ce fictio[. +n =%author, Gentry Le/e, has *.explor ed %@ e[$. very aspect@) of #this qu *?estion in the r ea]. l,/m ^@s o!f s=$ pace science, robotic e]xplo[ = ration %$;and );?#(th e human imag ?ination. At age 82, he has.#/ come to a reve!@l^!atory co[ nclus*,ion.