#头条创作挑战赛 #
People have long hated flies, one of the four pests, and who can tolerate flies that feed on dung living in their homes? The tug-of-war between humans and flies has never stopped. If I find a fly in my home, I may immediately close the doors and windows, pick up the slippers, and kill it.
But for animals like flies, they actually have many unknown secrets, did you know that flies used to be spies? In which country do flies represent courage? Why can flies hang upside down on the glass and not fall off?
Flies as spies
The clock goes back to the early summer of forty years ago, when an important piece of intelligence in the embassy of country A was obtained by the spy department of hostile country B, and the investigators of country A were very puzzled, the security level of the embassy was very high, how did country B steal the intelligence?
Johnson, an investigator in country A, was in charge of investigating the matter, and after arriving at the embassy, Johnson conducted a thorough investigation, and although Johnson was very experienced, he still did not find the crux.
Investigators such as Johnson used modern detection equipment to check the entire embassy, but never found the eavesdropping equipment installed in country B. Just when Johnson was at a loss, several flies suddenly flew in outside the window, one of which landed on Johnson's face.
Johnson was upset by the lack of progress in the investigation, directly grabbed the detection instrument with his hand to catch the fly, but the detection instrument sounded an alarm, Johnson also immediately became alert, it turned out that the wiretapping signal turned out to be moving, according to the law of signal strength change, Johnson suspected that the fly was the "spy" who stole intelligence.
He immediately closed the doors and windows, and quickly caught a fly, and sure enough, a tiny piece of metal was found in his body, and after examination, it was found that this small metal block was a bugging device, and the mystery was finally solved.
Who would have thought that the flies that usually fly in front of people's eyes could become animal investigators who steal intelligence, and after the flies were transformed by humans, they left their own small figure in the history of world espionage.
Flies become totems
Flies are indeed a dirty insect, they feed on feces, garbage, and are stained with various pathogenic bacteria, which can indirectly transmit more than a hundred diseases. Humans are very disgusted with it, normal people have long hoped that flies will soon become extinct, but the ancient Egyptians with clear brain circuits did not think so.
The ancient Egyptians believed that flies had an indomitable spirit, because the flies could not be driven away, and would return to the original place to continue to entangle, so the ancient Egyptians believed that flies represented brave and unyielding spirit.
Therefore, the ancient Egyptians actually used flies as totems, and also made fly-shaped medallions from gold to reward those soldiers who were brave and fearless in war, and the princes and dignitaries at that time also liked to wear fly-shaped accessories.
Why don't flies fall off the glass?
Flies have many peculiarities, they can walk quickly on smooth glass surfaces, but never fall, why? In fact, the fly has two sharp hooked claws at the end of each leg, and a cushion disc covered by fluff at its base.
The claw pad has a ribbon-like structure, and when it is filled with blood, it will sink inward into a suction cup-shaped, which can create a vacuum environment outside the suction cup and inside the suction cup, which is the main reason why flies can hang upside down on smooth glass without falling off.
In addition, the fly's claw pad also secretes a kind of mucus, which can also help it firmly adsorb to the object, the fly is also very light, the gravity is relatively small, these characteristics can help the fly on the glass like a fly.
The picture from the network invasion must be deleted