http://popurls.com/
Some of my fav science and culture sites are:
http://www.symmetrymagazine.org/breaking/feed/ http://nautil.us/rss/all http://feeds.feedburner.com/IeeeSpectrumFullText http://www.quantamagazine.org/feed/ https://www.sapiens.org/feed/ https://medium.com/feed/deep-code http://quillette.com/feed/ http://feedproxy.google.com/brainpickings/rss https://www.thisiscolossal.com/feed/ http://slatestarcodex.com/feed/ https://lithub.com/feed/