What is the simple but facts that most people are unaware?

Many people are unaware that the majority of the universe is made up of dark matter and dark energy, which cannot be directly observed but influences the cosmos significantly. Additionally, the average human shares about 60% of their DNA with bananas, highlighting the surprising commonalities across different forms of life. Lastly, the Earth's core is as hot as the surface of the sun, reaching temperatures around 5,500 degrees Celsius (9,932 degrees Fahrenheit).