IN A NUTSHELL 🔧 A retired farmer from China built a homemade submarine without formal engineering training. 🌊 The vessel, named Big Black Fish, can dive to a depth of 26 feet. 📹 A video of the submarine’s maiden dive went viral on Chinese social media, sparking widespread interest. 🚀 Zhang Shengwu’s achievement highlights the … Continue reading “My Homemade Submarine Could Kill Me”: Retired Chinese Farmer’s DIY Underwater Vessel Goes Viral While Maritime Experts Warn Of Catastrophic Pressure Failures