Some evolutionists complain that talk of molecular machines and engineered systems in the living world is a misleading figure of speech. Why, then, do human engineers seek to reverse-engineer them?
The "habitable zone" of a planet usually concerns its distance from the star such that it can support liquid water. But what if the star fries the surface with intense stellar winds?
Hydrogen cyanide is one of the most reactive and toxic molecules we know, but astrobiologists view it with almost alchemical qualities for the origin of life.