Across
- 3. Brazilian experimental physicist,
- 4. American and Barbadian theoretical cosmologist
- 5. American chemist
- 8. English mathematician and writer
- 10. English theoretical physicist, cosmologist, and author
- 12. American primatologist and conservationist
- 13. entrepreneur and business magnate
- 14. American biologist
- 15. German engineer
Down
- 1. tobacco farmer, a steel worker.
- 2. American biochemist
- 6. doctor/scientist in the early 1900s.
- 7. Electrical Engineer.
- 9. American engineer, former astronaut, and former director
- 11. American cartoonist, sculptor, author, engineer, and inventor.
- 13. pioneer in mapping the nearby universe.