Steve Caplin delves into the world of tech, with ChatGPT withdrawing a voice Scarlett Johansson claims is too much like hers and tech companies agreeing not to develop AI that poses an "intolerable risk to humanity". German scientists are developing on-demand cabs to travel on disused railway lines. Apple's new accessibiity features are impressive. Chinese scientists are improving transparent wood to be flame retardant and "superhydrophobic". L'Oréal is crowdfunding a hair colouring device. The NHS is using drones to carry blood samples. And the Police might not have thought through their new solution to eBike mugging properly. Learn more about your ad choices. Visit podcastchoices.com/adchoices