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Lucy Wrapson reports on her fieldwork analysing the curious cave paintings found on Isla de Mona, in the Caribbean, and their equally enigmatic artists.

°Õ³ó±ðÌýCambridge Animal Alphabet series celebrates Cambridge's connections with animals through literature, art, science and society. Here, K is for Kingfisher. Look out for them among the swamp cypresses at the Botanic Garden, where the secrets behind their cyan and blue feathers are being studied by an extraordinary collaboration of scientists.

̽»¨Ö±²¥conventional colours of Christmas – red and green – are not, as many might suppose, a legacy of the Victorians. Instead, they hark back to the Middle Ages and perhaps even earlier, according to Cambridge research scientist Dr Spike Bucklow.

Through his exploration of the science of art, the recipes of medieval artists and the writings of alchemists, art conservation scientist Spike Bucklow sets out to disentangle the alchemy of medieval paint.