Podcast and Internet Radio previews: NPR: Live Concerts, The Royal Society: Past Events and The Express Truth Podcast Welcome to the Telegraph's latest weekly podcast and internet radio column. It's here to provide readers with an accessible, friendly guide to the vibrant but dizzyingly crowded world of online listening. There's an extraordinary amount to explore including archived concerts, lectures, dramas and comedies. But to keep things simple, each week's column contains reviews of three downloadable podcasts and one live internet radio station. NPR - the hippest production company in American radio - have a jaw-dropping back catalogue of live concert recordings of some of the world's best bands, literally hundreds of which are available to download as podcasts. The genre list is eclectic: rock, jazz, classical, hip-hop, folk, world and dance. Artists on the roster include Laura Marling, The Beach Boys, Willie Nelson, Little Dragon, Sigur Rós and Bon Iver. The Royal Society: Past Events Why do we feel pain? What do the stars sound like? Do we need friends? Can computers see our world? These and many other striking questions are addressed in this excellent series of podcasts from the world's oldest scientific academy.The episodes all take the form of a lecture, with a well-known scientist, expounding upon a theme and taking questions. Reminiscent of the good old days of the Reith Lectures when they managed to be both fabulously esoteric and fascinating. The Express Truth Podcast Here's a show to really kindle your faith in the world of podcasting. Set up by two black men from Birmingham who were frustrated by the kind of coverage that their community was getting in the mainstream media, it's an open-hearted, keenly intelligent, winningly home-made piece of work. Each weekly episode focuses on a topical issue - from the Olympics to the recession to the anniversary of the 2011 riots - weaving in discussion, vox pop-style street corner interviews and audio clips from the news. Their thoughtful, multi-faceted two-part special on the riots is especially good; and contains some sobering reflections on the way the authorities have responded so far. AM 1710 Antioch OTR Anyone who thinks that internet radio is solely for futurists and dance music fans should tune into this fantastic little station from Illinois, which broadcasts crackly US radio dramas from the Thirties, Forties and Fifties, 24-hours a day. The programmes are scheduled generically - an hour of spy stories, then one of science fiction, and so on - and are almost dangerously addictive. There's old-time comedy, too.