The industrial demand for minerals is obvious to all. The annual consumption of iron ore by the Duke of tulip is an astronomical figure. Over the past few years, explosives have forcibly blasted the mine into a basin. One can imagine how fast the metal consumption is.


    Although the sun moon continent is not as exaggerated as the Duke collar, they have used a lot of rare metals for a longer time. Just a little calculation shows that such consumption speed will soon run out of metals, which will last for tens of thousands of years.


    "Wait! Did you ignore a question? " Although Meng Shu was funny, his mind was still very flexible: "if the continuous metal in the sun moon continent came from these metal plants, where did these metal plants come from?


    Metal elements will not be born out of thin air. These plants absorb trace metals in the soil at most. Theoretically, they can''t grow so big. Unless each plant here has mastered the element fusion technology, it can convert the hydrogen in the water into the elements they need. "


    Meng Shu''s question is to the point. If the plants here will fuse with heavy elements, they still have to run as far as they can!


    According to the re calculation of the background, the element content in the crust of Douluo star is still oxygen silicon aluminum iron potassium sodium potassium magnesium. Although there is a lot of iron, the iron content in ordinary soil is very small. These plants can absorb iron absorbing stones. I''m afraid the iron content will not be low. Even if more internal structures are silicon, they can not grow out of conventional terrain.


    The reason why metals are consumed is that rusted and crushed metals are difficult to collect and smelt again, and the content of iron in soil is about 2% to 3%. Human beings can hardly extract and utilize this part of iron, nor can they grow plants with gold as the main element.


    "There''s another possibility, but we have to go there and see if you can smell the subtle smell of sulfur in the air." Tang Chen collected a metal plant with soil samples completely, and then stopped observing these plants.


    "Sulfur smell? You mean volcano? " Jian Hongchen frowned and said, "in this way, there are indeed many volcanoes around some cities near this area. The strangest thing is that there are a large number of volcanoes in the center of the continent, not at the junction of plates. I didn''t feel it before, but it''s really strange to think about it now."


    "That''s right!" Posisi clapped his hands: "the asthenosphere is rich in silica and many metal oxides. Below the landform, the metal content is exaggerated. If there are active volcanoes nearby, it can explain the cause of this strange ecosystem."


    "Go! Let''s go inside! " Tang Chen took out a seven seater SUV from his storage watch. The huge tires like a tractor ensure that it can conquer almost all terrain.


    "Get in the car!" Posisi photographed the car horn and drove the vehicle. Her skills were the strongest. Relying on her strength, they were not afraid of sneak attacks by ghosts and beasts, so they turned on the car stereo.


    "Running with the wind is the direction, chasing the power of thunder and lightning ~" Rui Wenwen''s familiar voice made Tang Chen roll his eyes. When he was a windup car, Chengying also sang this song, but how could there be such a big difference with the same song?


    There is no road on the purple and black earth. Fortunately, the tires are large, the chassis is high, and the horsepower is full. They are forced to take a path and go away all the way.


    As an ecosystem, only producers are very unlikely, and consumers are mostly aggressive. The arrogance of cars has naturally attracted some attention.


    The ghostly light stared at the car and the metal shell on the body, which had a fatal attraction to some creatures.


    As night fell, the range that the lights could illuminate became smaller and smaller, and everyone soon felt the breath of uninvited guests.


    The chattering metal friction sound sounded, and a six legged creature crawling close to the ground appeared in the range of the lamp. They looked like insects, but they were different. They had no distinction between head, chest and abdomen, and their body size was about the size of a washbasin.


    Where they pass, the metal plants are eaten away, leaving only the silicate skeleton as the trunk. The pure metal on the off-road vehicle has great attraction to them. At this time, dozens of similar things are surrounding the vehicle.


    "What a big bug. It''s interesting that they are not soul animals!" Yu Xikong snapped his fingers across the car. This time it was still an EMP impact.


    Since the insect is metal, the electromagnetic pulse should cause some damage to its body.


    The insects surrounding the car were indeed affected by the electromagnetic pulse. Although they did not die, they made a sharp cry, and then tore up their companions like losing their wits.


    "Shall we go or not?" Posey''s foot was hanging on the accelerator. These insects were almost no threat to them, so she actually wanted to stay and observe.


    "Watch first!" Tang Chen waved his hand to let everyone guard, and then got off to observe.


    "This..."


    Jumping out of the car, everyone saw a strange scene. The bitten insect had a mechanical structure similar to the crank and connecting rod, and the topology of the overall skeleton was also different from the mainstream of carbon based organisms.


    Take human bones as an example. In topology, human bones are closer to trees than rings. They all take the spine as a trunk, like extending.


    But those insects do the opposite. It''s strange that the bones of the body extend in a circle around the outline of the body.


    The strange thing is not the functionality of bones. In fact, the supporting structure of this form is more stable, but the problem is that it is difficult for this form of life to develop a nerve center. Grid like bones often mean grid like nervous system, that is, exotic creatures like starfish.


    No nerve center means no brain. It is not difficult to see from the remains of these insects that they do not have a brain, but from their initial behavior pattern, their intelligence should be quite high.


    The grid like nerve structure has a symmetrical body structure on both sides. There is no clear nerve center, but it has no low intelligence. How can we see that this species also belongs to the type of flying itself on the road of evolution.


    "Shall we kill them all, or take some live samples back?" Chao Tianxiang stared at the metal insects killing each other and suddenly said, "do you think they will have a stable social structure like ants?"


    Chao Tianxiang''s words awakened the dreamer. Posisi immediately grabbed Meng Shu who was going to catch specimens, put away the SUV and lit it with a flashlight.


    "When they have a few people left alive, we''ll follow them!"


    [to be continued]


    Collection and recommendation ticket ~