 You're listening to Tech Life from the BBC World Service with me, Chris Vallance. This week, we look at decades-old tech that's still in use. It's slightly larger than a floppy disk, but is a technology that is still being developed, still being improved for very specialist uses. We try out a new AI-powered app that will help you recycle your rubbish and how a little bit of radiation can help save rhinos from poachers. That's all to come after the latest world news.