Across
- 2. Twice as noble
- 4. "The spinning coin" analogy
- 5. The fourth state that everyone forgets..
- 6. Light and its particles
- 8. The scientist who's the king of birds
- 9. The vacuum cleaners of space
- 10. Who's cat is it anyway?
- 12. It's there but you can't see it or detect it or do anything with it
Down
- 1. The weakest force
- 3. 7 billion dollars for a particle?
- 7. Nidevellir from the avengers
- 11. The cur(i)e to radioactivity
- 13. Is it relative or an illusion?