Across
- 2. Experimental physicist, parity violation
- 4. Co-discoverer of nuclear fission
- 5. Xray crystallographer of DNA
- 7. Mathematician, cryptanalyst at Bletchley Park
- 10. Early computer programmer, "Analytical Engine"
- 12. Nobel laureate in medicine, drug development
- 13. Discoverer of infrared radiation
- 15. Mathematician, Noether's theorem
- 19. Fossil hunter, paleontologist
- 20. Nobel laureate in nuclear shell model
Down
- 1. Pioneer in radioactivity research
- 3. Inventor of frequency hopping spread spectrum
- 6. First American woman in space
- 8. Renowned primatologist, chimpanzee expert
- 9. Apollo software engineer
- 11. Early climate scientist, greenhouse effect
- 14. Computer programming pioneer, "COBOL"
- 16. Pioneering aviator, first solo Atlantic flight
- 17. NASA mathematician, calculated orbits
- 18. Environmentalist, author of "Silent Spring"