Original sentence: Scientific American (informally abbreviated to SciAm) is a popular science magazine, one of the oldest and most prestigious, published (first weekly and later monthly) since August 28, 1845, making it the oldest continuously published magazine in the United States
Edited sentence: Scientific American (informally abbreviated to SciAm) is a popular science magazine published (first weekly and later monthly) since August 28, 1845, making it the oldest continuously published magazine in the United States