Science means a divided knowledge system that reflects the objective laws of nature, society, thinking, etc. Science is everywhere around us, all the time. For example: Why do people leave? Why does the bicycle move forward? Why does the computer work? etc. There are many sciences that even we humans don’t know. Why? If technology develops in the future, will aliens visit the earth? How will the earth become extinct? Today, let me tell you, why frogs only eat moving flies and turn a blind eye to dead flies? Haha, it turns out that frogs are known as "clairvoyance". Its eyes are particularly sensitive to distant moving objects. For example, if mosquitoes and flies pass by the frog's eyes, it will shoot out its arrow-like red tongue to tie up the prey. Get up, put it back in your mouth and taste the "big meal". It only takes one second to complete this action! The reason why frogs have the ability to catch insects with perfect accuracy is that their eyes have cells that can respond to moving objects. This kind of cells can judge based on the continuous movement of objects, but for stationary objects , but it turns a blind eye. No matter what, when faced with a stationary object, it just can’t see it! If it is a dead fly, just tie it to a thin thread and tease it repeatedly in front of the frog, so that the frog will eat the dead fly obediently. There are many interesting things like this around us, just waiting for our discerning eyes to discover. Science is really everywhere and all the time! Finally, I would like to offer you a famous quote from Mao Zedong: Natural science is a weapon for people to fight for freedom.