Best Video on Discovery of Silk

Want to learn all about Silk: when and how the fabric was discovered? Then, get the best explanation from Extramarks which is one of the leading e-learning websites in India. At Extramarks, besides the interactive and animated video tutorials, you also get the most comprehensive study material, detailed solutions, exhaustive practise questions, sample papers and many more useful learning tools. So, visit Extramarks website and get yourself registered.
https://www.youtube.com/watch?v=ZGwKbk-TqIg