Can you swim faster through water or syrup?
While it sounds a bit silly, it is actually fundamental to physics. It was a question that Issac Newton & Christiaan Huygens debated in the 17th century. When Newton wrote his Principia Mathmatica he included both theories.
Want to know the answer? Luckily for us, Edward Cussler & Brian Gettelfinger of the University of Minnesota have figured it out.