A world safe for robots and mammoths | Letters

Woolly mammoths | Transport investment | Baby boomers | Flat cakes | WeetabixCan it be right to bring back the mammoth (Report, 17 February)? It disappeared at the beginning of this man-made age of extinction. For it to be returned towards its end, with declining populations of elephants and rhinos, is irony itself. It also highlights that technology is now so poorly controlled that the march of scientific ability will continue to outpace its ethics. Is a world of super-intelligent robots and th