Environment11th-century polymath was the first to recognise past climate change After discovering fossilised bamboo in the 11th century, Shen Kuo deduced that the climate in northern China had been different in the ancient past News
TechnologyStretchy material could make bandages change colour when getting loose A stretchy material developed for holograms and an obsolete photography technique from the 19th century have been combined to create a material that changes colour as its tension changes News