Additional online reading Welcome to BFSU: › Forums › Volume One › Learning Progression “C”: Physical Science, Engineering and Technogy › Lesson C-6. Friction › Additional online reading Tagged: Enhancement This topic has 0 replies, 1 voice, and was last updated 10 years, 1 month ago by Bernard Nebel. Viewing 0 reply threads Author Posts November 8, 2014 at 12:06 pm #390 Bernard NebelKeymaster The Hobby Horse: 1817-Karl Drais and his running machine http://www.crazyguyonabike.com/doc/page/?page_id=40616 OR The invention of the wheel: How the Ancient Sumerians Got Humanity Rollin! http://antiquitynow.org/2013/08/20/kids-blog-the-invention-of-the-wheel-how-the-ancient-sumerians-got-humanity-rollin/ Author Posts Viewing 0 reply threads You must be logged in to reply to this topic.