In the postgraduate course Chemical Ecology throughout the tree of life, we will focus on how man-made changes to the environment can influence chemical communications within and between microorganisms, plants, herbivores and disease vectors. We will not only focus on how chemical information can be collected and analyzed, but also on the environmental factors that can affect chemical communications and zoom in on the underlying mechanisms of producing and perceiving chemical information. There will also be two hands-on workshops on how to analyze large datasets in the field of chemical ecology.