Fun facts can broaden your horizons, expand your knowledge, stimulate your thinking, and ignite a strong thirst for knowledge. Though obscure, they are useful and often more engaging. Today, we've compiled some interesting fun facts; let's expand our knowledge together!

 The principle of hand grenades 

 Pigs are incredibly intelligent; they can even play video games. Are you kidding me? Well, we can't underestimate them anymore.

How many steps will it take to return to the original position? 

Text as seen by people with dyslexia

 Individually, each black dot appears to be making a monotonous circular motion, but together they form a wave-like pattern of varying density and undulation. 

  Eighty percent of the rabbit's poop is eaten by itself... Only a bitter silence remains. 

  Rivers meander and change course frequently. Scientists have discovered that the ratio between the actual distance between a river's starting and ending points (blue line in the diagram) and the straight-line distance (red line in the diagram) varies for each river, but the average of this ratio for all rivers in the world approaches 3.14, which is approximately pi. This result was first published by Stølum in 1996 in the prestigious journal *Science*. However, his argument only holds true under relatively idealized assumptions. Later, Grime actually surveyed 258 rivers and found that the result was smaller than pi, which he initially attributed to factors such as river erosion.

 The sailors once mistook manatees for mermaids, because of your long, seaweed-like hair.

 A giraffe's tongue can reach inside its own ear. Tell me, what is the significance of this function?