[oneillpt]

Scientific American still provides content, but the recipe needs a fix:

Replace

for a in soup.find(attrs={'class':'primaryCol'}).findAll('a',attrs={'title':'Feature'}):

by

for a in soup.find(attrs={'class':'doubleWide'}).find(attrs={'class':'primaryCol'}).findAll('a',attrs={'title':'Feature'}):

This should be sufficient to get the recipe working again. If you wish you can also clean up articles a little more by replacing the remove_tags by:

remove_tags = [dict(name='a', attrs={'class':'tinyCommentCount'})
                                ,dict(name='div', attrs={'id':'bigCoverModule'})
                                ,dict(name='div', attrs={'class':'addInfo'})
                                ]