Butterfly colour has always amazed scientists, who are trying to find the origins of these vivid tones in order to maybe one day be able to reproduce them. Researchers from the University of Sheffield (UK) have come to the ESRF to study the subtle differences in the structural colour elements of Heliconius butterflies, and link them to the genetics that controls these structures.
Image credit: A Heliconius butterfly. Credit: Dany 13. https://www.flickr.com/photos/dany13/11465883596