TechnologyQuantum broadband becomes reality The first high-speed network link that is so secure it is theoretically unbreakable has been created, thanks to quantum physics ¿ìè¶ÌÊÓÆµ
EarthJane Goodall: 'There is no problem in having empathy' Fifty years after she began studying chimps, the conservationist explains why emotional involvement helped her understand them – and could save them Opinion