Steve Caplin looks at the Persistence of Chaos, an artwork laptop infected with the world's most dangerous malware. The app Northern Fail exposes the shortcomings of Northern Rail. Amazon is said to be developing a wearable device to detect emotions. Delivery robots can now conquer steps. the University of Plymouth develop the world's first raspberry-picking robot. There's a tiny selfie drone and a clever foldaway shooting-stick-style chair, which he demonstrates. Great radio!