Big rats like sheep could be real in the future. Big rats could be 80kg. Rats are now all over the Earth. They are in places that never had rats before. They are the strongest animals in many places. Maybe no other animals can kill rats in the future .
People take rats around the world. They can live almost anywhere. The future might have many kinds of different rats. After the dinosaurs(恐龙), many small animals grew big. The same thing could happen with rats. They might make other animals die. A question is what we would do about big rats.
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