Kryptos is a puzzle sculpture that’s been on the grounds of CIA headquarters in Langley, Virginia since 1990. Three of its four coded messages have been solved - and now we have a clue that might reveal the fourth. Plus: the story of the J.W. Westcott II, the only ship that has its own ZIP code.
You can take pontoon boat rides on Madison's Lake Mendota, and we picked one of the nicest nights to try it out.
Autonomous robot boats are a thing! Over time, researchers have taught them to row themselves gently down the stream and to connect to each other autonomously - soon they could help clean the water or even turn themselves into temporary footbridges.