Dr. Stone Season 3 Episode 4 English Subbed 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 channeling 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 emerges while making an engine, because one big enough for a ship will require tonnes of iron...