The 365 Days of Astronomy 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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