Cheap Astronomy - Dear Cheap Astro Ep. 123: The Big Questions

Asking questions and not always answering them.


Is there hope?


Well, sure. The question arises where the Drake Equation, aiming
to quantify the likely number


of detectable intelligent civilizations out there includes a term
representing the inherent risk of


any intelligent civilization destroying itself. It is just a
risk, could be low could be high, but its


wide acceptance as a part of the whole equation does suggest we
have some pessimism about


our own future.


 


Could dark matter be black holes?


Well, no. Firstly. we've discussed before how black holes can't
really be dark matter. Dark


matter is not only invisible, but it's also transparent. Black
holes can be invisible against a black


background and after all space is a black background.


 


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