Forget all the Mars rovers. I really couldn't care less whether anyone gets to mars in my lifetime. That won't change much of anything. I don't want to hear the decades of debate on whether Mars had microbes once upon a time. I want a telescope to find an atmosphere proving that jungles exist on other planets today. I want them to find a planet so thick with life that nobody can deny it. I want Degobah. That will expand our perspective as a species.
> I want a telescope to find an atmosphere proving that jungles exist on other planets today.
In this case you would be most interested in NASA’s planned LUVOIR telescope[1]. In an interview the gentleman in charge of preliminary design claims that it will answer the question with a 95% certainty.[2]