2. A police officer halts traffic in New York to let a mother cat safely carry her kitten across the street, circa 1925.

3. Albert Einstein, challenging the racial climate of the era, visited Lincoln University in Pennsylvania—the first Black college in the US to grant degrees—to teach a class.

4. This image captures 100,000 Iranian women protesting against the hijab law in Tehran, 1979.

5. Charles Thompson meets his new classmates at Public School No. 27 in September 1954, just four months after the Supreme Court declared racial segregation unconstitutional. He was the only African-American student at the school.

6. A remarkable photograph of a German soldier defying orders to assist a young boy in crossing the newly erected Berlin Wall after being separated from his family, 1961.

7. Princess Diana, known as the “people’s princess,” shakes hands with an AIDS patient without wearing gloves, 1991.

8. Meet the “Night Witches,” brave Russian female pilots who conducted nighttime bombing missions in 1941.

9. This is a photo that would outshine today’s social media profile pictures.

10. This 1901 photo, titled “Happiest Man in China,” was taken by British anthropologists documenting the Chinese. Unaware of photography’s seriousness, the man playfully posed with a smile.

11. A somber moment in history that serves as a reminder for us all.

12. In Mogadishu, 1993: An Italian soldier offers food to a local orphan.

13. Kind-hearted American soldiers care for a wounded dog on Orote Peninsula, 1944.

14. They were breaking barriers even back then.

15. Margaret Hamilton stands with the handwritten navigation software her MIT team developed for the Apollo Project, 1969.

16. A man takes a stand against apartheid by riding a bus in Durban designated for white passengers only, 1986.

17. This is how a Ukrainian immigrant celebrated Stalin’s death in 1953.

18. Guide Samson Beaver of the Stoney First Nation poses with his wife Leah and their daughter Frances Louise, 1907. Photo by Mary Schäffer.

19. Here’s a glimpse of an Iranian beach just months before the Islamic Revolution, 1979.

20. Bodybuilding icon and actor Arnold Schwarzenegger shows support for disabled athletes in 1983.

21. Tokyo residents mourn Hachiko in 1935. Hachiko faithfully waited for his owner, Professor Ueno, at Shibuya Station every day for 9 years, even after Ueno’s death in 1925.