Across
- 2. Environmentalist known for founding the Sierra Club
- 3. British Prime Minister during WWII
- 4. Tech visionary who co-founded Apple
- 8. Organization aimed at international peacekeeping
- 10. Astronaut who was the first man to walk on the moon
- 12. Influential social media platform for short videos
- 15. Civil rights leader who delivered the 'I Have a Dream' speech
- 16. The highest governing body of the Catholic Church
- 17. Influential artist known for the 'Mona Lisa'
- 18. Nonprofit organization founded by Bill Gates
- 19. The Queen of Pop
- 20. Facebook co-founder and CEO
Down
- 1. Movement for women's rights to vote
- 5. Famous for the theory of relativity
- 6. Pioneering nurse known as 'The Lady with the Lamp'
- 7. Social media influencer with millions of followers on Instagram
- 9. Journalist known for 'The Diary of a Young Girl'
- 11. Author of 'Harry Potter'
- 13. Youngest Nobel Prize laureate
- 14. First African-American President of the USA