Two questions about aliens – where are they and how do we find them

Questions about aliens have been around for as long as we gazed at the stars. The other good news is that we are getting pretty good at map reading. Aliens, of course, do not necessarily live light years away and we may not recognise them when we do meet them. And if aliens turn to be a small blob of green slime, well, they are definitely amongst us and there is little chance of having a meaningful conversation. In the meantime, here are some ideas about how aliens might be communicating with us, but we just don’t know.

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