| NOBLEGASES | The ___" ___"; Isaac Asimovs account of the discoveries of argon, helium, krypton, neon, radon and xenon (5,5) |
| INERT | Word for "inactive", used to denote an argonon, or rather an unreactive monatomic noble gas - argon, helium, krypton, neon, radon or xenon (5) |
| FRUITS | With citrus varieties central to the discoveries of James Lind, vitamin-rich foods occurring in all colours, grown by batologists, pomologists and orchardists (6) |
| RAMSAY | Chemist who helped establish the noble gases argon, helium, krypton, neon and xenon as a new group in the periodic table |
| NEON | Element that shares a group of the periodic table with argon, helium, krypton, radon and xenon (4) |
| RAREGAS | Any of the unreactive elements helium, neon, argon, krypton, radon and xenon (4,3) |
| HAKLUYT | Richard -; compiler of Principal Navigations, Voyages and Discoveries of the English Nation (7) |
| RAYLEIGH | Lord -; title of the co-discoverer of argon who married Arthur James Balfour's sister Evelyn in 1871, the same year he explained why the sky is blue (8) |
| FRISCH | Austrian zoologist who wrote The Dancing Bees based on discoveries of honeybee communication/language such as the waggle dance (6) |
| SUN | 'The --- ---', second of Isaac Asimov's Robot series of novels (3) |
| NAKED | 'The --- ---', second of Isaac Asimov's Robot series of novels (5) |
| SPACEOPERA | Genre of sc-fi film or novel such as the Star Wars franchise or Isaac Asimov's Foundation series (5,5) |
| ROBOTS | In Isaac Asimov's The Naked Sun, what outnumber humans by 20,000 to one? (6) |
| GASSES | Radon and neon |
| GASES | Such as radon and neon |
| HUBBLE | Astronomer whose realisation that the universe is expanding was enabled by "human computer" Henrietta Swan Leavitt's discoveries of Cepheid variables (6) |
| XENON | Kin of argon and neon |
| SCIFI | Genre of Isaac Asimov's "Foundation" |
| ABA | *Isaac Asimov's "Murder at the ___" ('76) |
| HARI | Psychohistorian Seldon of Isaac Asimov's "Foundation" books |
