Fun facts, those interesting and surprising facts, can often broaden our horizons and increase our knowledge. Below is a collection of 25 fun facts you might not know. If you know even one of them, ignore this; if you don't know any of them, then you're a winner!

1. Before 1945, airline flight schedules without computer records looked like this.

2. Due to the long cruise journey, the loss of passengers is inevitable, so most cruise ships are equipped with morgues!

3. During World War II, many female pilots (including Li Yueying, one of the first Chinese-American pilots) participated in aircraft support work.

4. If you are an ordinary person, after two generations, no one may remember your name!

5. Ancient Egyptians used trained baboons to capture criminals.

6. Crocodiles can remain underwater for up to two hours while waiting for their prey.

7. The venom of the Brazilian wandering spider can cause abnormal erections within hours of being bitten, which can then lead to permanent impotence.

8. Hannah Stilley was born in 1746, and the photograph was taken in 1840. She is one of the earliest people to be photographed to date.

9. The sun is not actually yellow; it appears white to us from space when there is no atmosphere to scatter its light.

10. The place where Caesar was murdered is now a cat sanctuary.

11. The bed in "The bright moonlight shines before my bed, I suspect it is frost on the ground" does not refer to a bed for sleeping.

12. In the 19th century, women who rode bicycles were warned that they might develop "bicycle face," a condition characterized by bulging eyes and a protruding chin.

13. In Japan, there is a special type of watermelon that sells for hundreds of dollars because of its square shape.

14. The first transaction on the internet was about marijuana.

15. Dolphins renew the cells of their outer skin layer every two hours, keeping them youthful and wrinkle-free.

16. Before the advent of switching networks, Swedish telephone towers had more than 5,000 lines.

17. When the Rubik's Cube was first invented, a mathematician claimed that it was impossible for someone without a master's degree in mathematics to solve it within a month, and that it would take the average person 30 years to solve it...

18. During the Great Smog of London in 1952, blind people helped others find their way home.

19. Did you know that ants don't sleep?

20. Theoretically, jellyfish will not die naturally unless they are eaten by other creatures.

21. Until the 20th century, baby boys typically wore pink clothes, while girls wore blue clothes.

22. Penguins do have knees. Although their knees are not visible because they are hidden under their feathers, they do have knee joints.

23. Medieval Italian satchels give off a "heavy metal" vibe.

24. This is the style of a World War I pilot's selfie.

25. All the meteorites landed precisely in the impact crater!

Hopefully, these little-known facts will amuse you and broaden your knowledge!