Robot-boat startup HavocAI has built 42 autonomous vessels in 18 months. And now, as the military focuses on deterring China, the company is working to finish a 100-footer by the end of the year.

This Minecraft tutorial shows step-by-step how to build a Viking boat. The design uses wood, sails, and Nordic details to capture the look of a traditional longship, perfect for rivers, lakes, or ...