Dr Colombano told Califoria's SETI-backed Decoding Alien Intelligence Workshop back in March that scientists need to broaden their idea of what an extra-terrestrial would like like.
'I simply want to point out the fact that the intelligence we might find and that might choose to find us (if it hasn't already) might not be at all be produced by carbon based organisms like us,' his report read.
He added that scientists must 're-visit even our most cherished assumptions', which has implications for everything from an alien's lifespan to its height.
'The size of the 'explorer' might be that of an extremely tiny super-intelligent entity,' he says.
Also at Tiny aliens may have visited us and we just didn't know: NASA scientist
(Score: 2) by Runaway1956 on Saturday December 08 2018, @08:35PM
I think that's the whole argument, in a nutshell. We don't know enough to make all the assumptions that we make. That is why no one is capable of making believable suggestions for alternative mechanisms.
The most believable alternative that I've ever heard (or read) involves a hive mind. Individuals within the hive may be dumber than rocks, but the hive mind is extremely intelligent. The bugs in Ender's War are probably the best example. "Communication" between the various Bug bodies is based on something that we might loosely translate into telepathy, although that is not the term that Card used.