There are individuals who would risk everything to land on Mars to verify any evidence of life that exists or used to exist there even if that life is no more intelligent than they are. Well, any junior high school dropout can tell you that life already exists here on earth; and that this kind of life as evidenced by this image, is what men agree is worth the sacrifice that it takes for them to defend it.
The truth is always self-evident.

"Beauty is truth, truth beauty,—that is all Ye know on earth, and all ye need to know."

Once upon a time, in a world that did not need proof that there was intelligent life on Earth, it would have been redundant to credit John Keats with these two lines from his masterpiece, but in "The Golden Age of Absur....no...(let's give credit where credit is [maybe] due:) Existentialism."
The poem is "Ode on a Grecian Urn," by John Keats