This will change your perception:

1. The largest moon in the solar system: Ganymede is the largest moon in the solar system, with a diameter of about 5,268 kilometers, even larger than Mercury.

2. The oldest living organisms in the world: According to the fossil record, the oldest living organisms are microorganisms that lived about 3.5 billion years ago in the early oceans of Earth.

3. The highest mountain: Mount Everest is the highest mountain on Earth, with an altitude of 8,848 meters, located in the Himalayas.

4. The world's longest river: The Nile River is the world's longest river, with a total length of about 6,650 kilometers, flowing through 11 African countries.

5. The world's smallest mammal: Kangaroos are among the smallest mammals. One species, the quokka, is only about 30 centimeters long and weighs about 1.2-2.5 kilograms.

6. Largest animal: The blue whale is the largest known animal, with the largest individuals reaching 30 meters in length and weighing up to 173 tons.

7. The earliest civilization: According to some historians and archaeologists, the earliest human civilization appeared in ancient Egypt around 3500 BC.

8. The earliest flying machine: Around 480 BC, the ancient Greek artist and engineer Daedalus designed and built a flying machine called Icarus.

9. The earliest telescope: Galileo Galilei invented the first refracting telescope in 1609 for observing astronomical phenomena.

10. The earliest computer: Charles Babbage designed a computer called the Analytical Engine in 1837, which is considered the father of the modern computer.

These little-known facts not only give us a deeper understanding of the world, but also make us aware of many amazing truths about human history and nature. Although this knowledge may overturn our understanding, it also makes us more fascinated by the world.