Following this line of thought, scientists soon extracted special enzymes.
At the beginning, scientists made this enzyme into a medicine and had people take it. As a result, they found that the human body's ability to adapt to harsh environments was indeed improved. However, as the drug was metabolized, this adaptability became weaker and weaker.
Since it cannot be taken externally, it can only be combined with the human body. So scientists took another research approach and fused the enzyme fragments into human genes.
This fusion process took a lot of effort, but in the end the research failed.
By this time, scientists also realized that it was too difficult to change species.
The remaining humans put all their energy into changing and optimizing the environment. People planted a large number of plants that could adapt to underground life. After a long time, the environment finally saw limited improvement.
Rejuvenation can release oxygen through the soil, which makes the environment above ground not so harsh.
After such a long time, the original vegetation on the ground never grew back.
The surface is now covered with a plant similar to thorns and mosses. This plant does not have as rich nutritional content as rejuvenation, but it can also carry out photosynthesis and emit trace amounts of oxygen.
The species in the ocean also changed. A large number of precious and delicate deep-sea fish died due to the polluted environment, and amphibians took over the water sources. This new species evolved very quickly and was named axolotl by scientists.
It is now highly suspected that salamanders have intelligence, and they seem to be poised to dominate marine resources and compete with humans.
Humanity is no longer as proud as it once was. After a long period of living underground, we have come to realize that if we continue to blindly consume resources, we will eventually become extinct.
Newborn animals and plants have a strong ability to adapt to the environment, but humans are as fragile and delicate as newborns. In some places with low oxygen content, they have to wear helmets to live.
Anyway, people finally returned to the ground and everyone cherishes their current life.
Although the earth's resources have been consumed too much, the sun will still shine for many years. If humans are not destined to die, they may be able to hold on until the Discovery returns, bringing hope to everyone to migrate to a new planet.
Humans returned to the ground, and the original order remained unchanged. After so many years of development, Su Nian and Chu Beichen's Nian Chen Group had grown unprecedentedly, and some people asked them to participate in management, but neither of them was interested in government affairs.
Now that the couple are both quite old, they just want to improve their living environment to the best of their ability.
Chu Yongkang and Aya have been away for ten years on the Discovery. At the beginning, the Discovery could regularly send back information to report its itinerary and new discoveries to Earth, but three years ago, the Discovery suddenly lost contact.
It is not known whether an accident occurred on the Discovery or the message could not be transmitted back in time.
For this reason, Su Nian and Chu Beichen have been extremely anxious. No matter what, Chu Yongkang is their child. As long as the couple is alive, they are willing to wait for Chu Yongkang to come back.
The only thing to be thankful for is that after experiencing the difficult years in the dungeon, humans' immunity and survival ability have been greatly improved compared to before. Although it has not reached the level of the lizard, it is much stronger than before.
Hope is not extinct after all.
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