With the help of DNA preserved in animal fossils and specimens, and using increasingly advanced cloning and genetic technology, humans have been able to revive some long-extinct animals, such as mammoths, dodos, dinosaurs and so on  At the same time, there is also a big discussion in the scientific community about whether human beings should resurrect extinct animals  Supporters believe that resurrected animals are expected to restore the damaged ecological environment in some areas  For example, mammoths live on the vast grasslands of Siberia, and their droppings are excellent fertilizers for nourishing the grasslands  After the mammoth became extinct, the prairie lacking fertilizer was gradually replaced by the tundra
If the mammoth can be revived and returned to Siberia, it will help to reduce the area of the tundra and gradually restore the grassland ecosystem
Most of these animals gradually disappeared in the process of human development, and it was human activities that led to their extinction