Harsh environment is just a refuge

  At the height of 10,000 meters in the Himalayas, there is no life at all. However, the bar-headed geese that migrate through the country each year can fly to this height with the winds of 200 kilometers per hour. In the process of flying, the bar-headed geese breathe once every second, 400 beats per minute, and the special blood cell structure helps them absorb every trace of oxygen.
  In the ocean far from the bar-headed geese, the sea lion breathing with the lungs is facing another different extreme challenge. Sea lions are natural divers. What if humans are placed in this extreme environment? During a dive, the pressure doubles every 10 meters down. At a depth of 60 meters, the water pressure can crush the diver’s chest and squeeze the lungs out of the ribs. Both humans and sea lions rely on slowing metabolism to save oxygen and reduce heart rate to less than 10 beats per minute. So far, the human dive record is 134 meters, sea lions can easily reach twice the depth of this number, their blood can store more than 5 minutes of oxygen.
  Fairy Shrimp is the master of the animal world to challenge the ultimate survival. The shrimp eggs of the fairy shrimp are smaller than the gravel, but they contain enormous vitality. When it comes to drought and no rain, it can wait for 10 years until the day when the water comes. Even in boiling water at 100 degrees Celsius, they can hatch as usual. In high temperature environments, embryonic cells of shrimp eggs are protected by a tough protective shell and a thermal protective layer. When the water cools down, the miraculous change process begins – the shrimp eggs hatch! Resist the boiling water to cook, this excellent adaptability, let the fairy shrimp make full use of the leeches that appear only once every ten years.
  The harsh drought is often encountered in southern Africa, and death is often unavoidable for fish that have left the water. In this environment, lungfish do not rely on veins in the sputum to absorb oxygen. Their fishing rods are like simple lungs that allow them to extract oxygen directly from the air. Lungfish often dig holes to escape the hot and dry environment, it swallows mud, digs out a space, and then drains the mud from under the armpits. After that, it secretes a layer of mucus covering his entire body. After the mucus layer has dried up, it forms a sealed body protection membrane that isolates the fish from the arid environment. Before the rain arrives, the lungfish can wait for four years, waiting for the rain to free it from dormancy. At the end of the dormant period, the lungfish even consume their muscles as food, but they still retain enough energy to return to the water on the day of the rain.
  Whether it is a spotted geese flying high in the sky, a sea lion that can dive deep into more than 260 meters deep sea, a fairy shrimp that can hatch in boiling water, or a lungfish with nirvana in the drought, they all have one common feature – body type Small, at the low end of the food chain. Moreover, the environment in which they live is without exception. Interestingly, the harsh living environment is precisely their refuge – in such an environment, they have superior ultimate survivability, but their natural enemies are difficult to survive.