Animals are born with special “equipment”

Swallow’s “Navigator”

  Swallows will never get lost in the process of moving south to the north every year, no matter how long the journey is. It turns out that the swallow’s blood contains a large amount of iron, which is magnetized by geomagnetism to form numerous micro-magnetic needles, like the directional compass of an airplane or ship, which always points to the north pole for the swallow’s navigation.
  At a certain temperature, the micro-magnetic needles in the blood of swallows point at different angles from the flight direction, which will cause different reactions in their bodies. In warm spring, when swallows fly along the direction of the micro-magnetic needle, they will have a specific feeling in their body. Based on this feeling, they will instinctively think that the flight path is correct; if the course deviates from the direction of the micro-magnetic needle, it is an abnormal feeling Swallow realized that the flight route was wrong, and adjusted the course in time to regain a normal feeling, so as to ensure the northward migration.
  Same thing. In the cool late autumn, swallows migrate in the opposite direction with micro-magnetic needles, which will produce another special feeling, and use this feeling to determine the course, thus ensuring a smooth southward migration.
Giraffe’s “Pressure Regulator”

  A giraffe has an extra-long neck. When it lifts its head completely, it is about three people tall; the height difference between the brain and the heart is about two meters. In this way, when it frequently lowers its head and raises its head, the brain is under the violent impact of the blood pressure that fluctuates, and accidents are inevitable.
  In order to ensure the safety of the brain, there is a blood flow regulating valve in the blood vessels below the giraffe’s brain. When the blood entering and leaving the brain passes through this valve, the blood pressure is regulated and becomes relatively stable. When the giraffe bows its head to drink water, the valve automatically closes to prevent the brain from suffering from high blood pressure, so as to avoid cerebral hemorrhage; when it raises its head to feed on leaves, the valve automatically opens to ensure that sufficient blood is sent to the brain to avoid instantaneous hypoxia. Dizzy, and even fell to the ground.
  In addition, the blood flowing out of the brain from the venous blood vessels passes through this valve, which will have a certain “siphon” effect on the blood flowing into the brain from the arterial blood vessels, so as to reduce the load on the heart during blood supply, thereby reducing the possibility of myocardial strain.
Grizzly’s “biological clock”

  Although grizzly bears have the habit of hibernating, they do not enter the cave to hibernate when the body feels cold, but the “biological clock” in the body grasps the timing of hibernation on time.
  Experts from Yellowstone Park in the United States confirmed the above statement by tracking and observing grizzly bears for a long time. One year in the late autumn, the north wind was howling, and the storm was approaching, and people thought it was time for the grizzly bear to enter the cave. However, they still roamed back and forth in the forest for food, apparently, the hibernation time has not really come. Sure enough, after a few days, the weather turned warm again.
  The “biological clock” of a grizzly bear is actually some sensory cells in its body. These cells are very sensitive to climate characteristics such as temperature, air pressure and light intensity when the seasons change, so as to accurately distinguish between abnormally cold weather and the real arrival of winter.
  In the early winter, the “biological clock” of the grizzly bears struck for the first time, so they began to yawn lazily, looking for a place to hibernate. After a period of time, the biological clock struck a second time, and they were walking in the mountains and forests, preparing to enter the cave. Before long, the biological clock struck for the last time, and they burrowed into their burrows and slept through the harsh winter.
The “multi-purpose sword” of the narwhal

  The narwhal, which lives in the waters near the Arctic Ocean, has a sword-like horn on its head. It is said to be a horn, but it is actually a long tooth born in the upper jaw. It is 3 meters long, and some are almost as long as the body. The surface is distributed with spiral grooves, which looks like a drill bit.
  It has been preliminarily inferred that this tusk has multiple functions: it can be used as a combat weapon for self-defense; as a predatory tool, it is used to pierce the body of prey; it can also be used to pierce through the thin ice layer on the water surface , it is convenient to put your head out of the water to breathe. Moreover, this special tooth shape streamlines with the entire body, making it swim faster in the water. It is said that when some small fish see this strange horn, they will swim over and watch curiously, and eventually become the delicacy of narwhals.
  Some scientists believe that when the narwhal moves rapidly, the excess heat generated by the body will be dissipated through the tusks; at the same time, the tusks can also sense the sound wave signals from nearby, which are used to detect the surrounding movement and the position of the prey. It can be said that the tusk of a narwhal is a “long sword” with a wide range of uses.
Jumping spider’s “reflector”

  When male jumping spiders are courting, in addition to winning each other’s hearts with gifts such as bugs, they also win the love of female spiders with their enthusiastic and unrestrained dance.
  The jumping spider danced and danced. When the other party saw it, they opened their hearts and both entered the bridal chamber. However, if only the males were exposed to UV light, only the females were active and the males did not respond to the females; if only the females were exposed to UV, the males were enthusiastic and the females were not. Indifferent to male spiders.
  It turned out that the vision of jumping spiders, like bees, is to see everything in the outside world by detecting the ultraviolet rays reflected from the outside world. Their head, legs and feet are covered with a layer of scales, and the fluorescent substances on the scales can reflect the ultraviolet rays in the sun. Usually, jumping spiders can only see each other through the UV light reflected from each other’s bodies. Therefore, they can only see each other by placing them under the ultraviolet light; otherwise, one party cannot see the other party, and it is inevitable that they will not be able to communicate and communicate with each other. Accordingly, people invented instruments such as money detectors and black light lamps for trapping and killing insects.
Whale’s “megaphone”

  Pilot whales are named for their huge heads. The front part of the head of this kind of whale is high and protruding, and it looks a bit like the forehead of the birthday star. The forehead of the pilot whale is full of tofu brain-like things. This is not its brain. It is actually a large fat body, shaped like a convex lens, which can strengthen and amplify the weak ultrasonic waves coming from the surrounding, which is equivalent to a loudspeaker device.
  We know that a convex lens can condense light into a strong point of light; in the same way, after ultrasonic waves pass through a lens-shaped object, they can also converge and become stronger. Based on this, it is not difficult to understand that the pilot whales, which rely on sonar devices to detect surrounding targets, rely on the lens-shaped fat body on the forehead to converge and amplify the ultrasonic waves reflected from the surrounding underwater, and transmit them into the inner ear, so that the weak sound can be transmitted to the inner ear. Hear it more clearly. And use this to identify the obstacles ahead, and determine the position, size and movement speed of the prey and even the enemy, so as to better deal with it.

Spider’s “Silk Mill”

  If a spider silk of three or two layers is pulled around the earth, it will not break even though it is so thin that it is invisible to the naked eye. Spider silk is not only very resistant to tension, but also extremely elastic and strong. It is used to make body armor, and bullets flying at high speed hit it, not only can’t penetrate it, but also bounce back. In addition, spider silk is also resistant to heat and cold, strong corrosion resistance, and is generally difficult to destroy. So, how do spiders make things with such excellent performance?
  The spider bites the bug, injects the venom, waits for the other party’s body to melt, and then sucks it into the body for digestion, converting it into protein components mainly composed of glycine, alanine and serine. When spiders spin silk, the mucus of this composition is discharged out of the body and combined with air to form spider silk composed of protein molecular chains. Among them, the irregular protein molecular chain makes the spider silk have good elasticity; the regular protein molecular chain makes the spider silk have high strength. Spiders use this silk to weave unbreakable insect nets.