DiChristina is the eighth person to assume the top post in the magazine's 164-year history and the first woman to hold the position. She has been the acting editor in chief since this past June after the departure of then editor-in-chief, John Rennie."
So, the 7 previous editors have held the post 164 years, or better than 20 years each.
The copy of Scientific American I read on the train tonight is a bit different than the ones I remember as a kid, but it's been a gradual evolution and the articles still have those fantastic graphics that explain difficult concepts in a simple, understandable way. If there was a Nobel Prize for science illustrations, Scientific American would have won it many times over.