We spend more on chocolate each year than investors spend on gold - but as Easter approaches, how much do we really know about where it comes from or how it is made? Panorama reporter Paul Kenyon goes undercover as a cocoa trader in West Africa and discovers children as young as seven working long hours on cocoa farms, helping to make the chocolate we love so much. He buys a to...

Gene editing is transforming medical research and could deliver new treatments and cures for diseases. It also gives scientists control over evolution, allowing genetic changes to be forced through species. 　　基因编辑正在改变医学研究，并可能提供新的治疗和治疗疾病。它还赋予科学家对进化的控制权，允许通过物种强制进行基因改变。