Will we recognise alien life if we find it?
The answer to that is: if it’s a very basic life form we will only know it as living if it’s based on carbon and water. The reason for saying that is that you only have to look at the articles and comments on this subject here at Science 2.0 over the last few weeks to see that almost everyone has an axe to grind, or a hobbyhorse to display, or they are led astray by careless language.
Life, it seems, is a subject close to everyone’s heart, (no pun intended) except, of course, for those who consider the quest for certainty about its meaning to be mere pseudoscience.