Across
- 1. Longitudinal Earthquake (1,4)
- 2. Os (6)
- 3. In psychology, the human mind (6)
- 6. Space station launched by the US in 1973 (6)
- 10. Einstein-Rosen bridge (8)
- 11. PC range launched by Apple in 1984 (9)
- 13. Supply with O (9)
- 15. Wild cattle, extinct since the 17th century (7)
- 18. Expert in a particular field (10)
- 19. Subunits within a cell (9)
- 20. Ω (5)
- 21. ___ mechanics, theory in physics to describe nature at the smallest scales (7)
Down
- 1. Iron sulphide, FeS2 (6)
- 3. Symmetrical plane curve (8)
- 4. Flowering plant in the iris family (8)
- 5. Ge (9)
- 7. Polytechnic home to the Lucasian Chair of Mathematics (9)
- 8. Valentina ___ (b.1937), cosmonaut (10)
- 9. City in which the first nuclear reactor was built (7)
- 12. Mineral aggregate; not paper or scissors (4)
- 14. Opposite of zenith (5)
- 16. Puzzle in which pictures represent words (5)
- 17. Dugong or manatee (6)
- 22. Elementary particle similar to the electron (4)