Dr. Stone Season 3: New World Episode 4 English Dubbed Episode Title: Eyes of Science Episode Description: The existence of Why-Man is heavily debated as he may be a new enemy. Senku immediately crafts Scientific Eyes, using glass coated in Sphalerite and the electricity channelling power of crystals he creates a rudimentary Cathode-ray tube television screen, which when connected to the radio tower becomes a radar/sonar to accurately pinpoint targets over vast distances, even underwater. Testing the sonar Chrome is astounded it can even find fish, a welcome bonus for the upcoming voyage. The next issue arises; an engine big enough for a ship will requires tonnes of iron. Surprisingly it is Chrome who solves the issue; using what he learned from Senku he connects an electromagnet to the radar and spontaneously reinvents the Metal detector. Locating an iron deposit in a cave miles from the village they begin mining with Senku declaring they have reached the Industrial Revolution. Senku uses a petrol by-product plus gravel to make Asphalt concrete, allowing iron to be driven from the mine to the river by a paved road where Ryusui then sails it to the village. Under Senku and Kaseki’s expertise Minecarts are designed to make mining the iron even easier.