Dozens of museums—presenting art, cultural heritage, natural history, and science—will open their doors on Sunday, January 28th and invite visitors to attend their museums free of charge. Though free, some of the museums require you to RSVP or to obtain tickets online so please do your research and plan accordingly.  Museums Free-for-All is partnering with Metro, encouraging visitors to Go Metro to explore participating museums, many of which are a short walk from Metro bus or rail stops. Experience a day of…