Steve Caplin and Simon Rose look at the latest in high- (and low-) tech. Kyoto University have produced a face mask that can detect Covid, while Amazon are now selling PCR tests. Scientists have developed a phone security system that relies on how you walk, commercial-sized planes using liquid hydrogen and a yacht that makes its own hydrogen from seawater. With wearable electronics becoming more popular, Canadian boffins have come up with a washable battery while some in Japan have devised a bus that is also a train - and vice versa.
