This was good, and very interesting. While it's still looking and comparing Newtonian physicist with Einstein's relativity, it's just focusing on one particular bit, and going into more detail of that - we go from the finding of the theory of gravity, use it to explain certain issues in the solar system by actually predicting and then finding another planet, but then figuring that answer is the answer to yet another problem, the problems with the orbit of Mercury in the math. But another planet, named Vulcan (as in the title), wasn't the problem here, and it took a while for plenty of scientists to finally let that sink in. Then comes Einstein, and his general theory of relativity gives the answer to it. It was good, thorough, but short and to the point.