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Others have argued against the use of the bombs, with evidence such as it was not needed, it was inhumane and it led to the modern atomic age and threat of nuclear war. Still, others argue that perhaps the first bomb used against Hiroshima was justified but that the second used against Nagasaki was not.
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Answer:
One of the first European exports to the Americas, the horse, changed the lives of many Native American tribes. The mountain tribes shifted to a nomadic lifestyle, based on hunting bison on horseback.
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Yes and no. Mutations in experiments can be helpful to learn new things medically. At the same time negatives can come from it like stronger viruses.