Print out the instructions and cut-out templates (see http://chandra.harvard.edu/resources/podcasts/2inch/ for the printer-friendly PDFs).
How likely do you think it is that there is life elsewhere in our galaxy? Intelligent life?
What challenges are there in trying to communicate with any potential life around other stars? In other galaxies?
Some people say they feel insignificant after understanding the scale of the universe; others say it makes them feel that life on Earth is special; still others feel amazement at the power of the human mind. What's your view?
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