Scientific American (formerly known as Scientific American, abbreviated as science AM) is a popular science magazine in the United States. It began on August 28, 1845. It was first published weekly and then published monthly. It is the longest and continuously published magazine in the United States, and it is also the famous science (Science). So far, 151 Nobel laureates have contributed. In 2009, four of the authors of this journal won the Nobel Prize. In December 2005, it had about 555000 domestic (American) circulation and 90000 international circulation every month. Although it is considered a popular high-level academic journal, this journal does not adopt a similar concept to nature Journal peer review reviews manuscripts, but provides a forum to present scientific theories and new scientific discoveries=
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