It might be intensive and hard to organize and teach in a summer school, but it's one of the most fulfilling experiences for me, Jeff Andrews (University of Florida), Paolo Bonfini (Alma Sistemi) and Grigoris Marvelias (Univeristy of Athens). 

We welcomed 30 students from all over the globe, and explored the world of astrostatistics, from classical to Bayesian, and Machine Learning to Deep Learning!

A presentation on the search for extraterrestrial life and intelligence from the antiquity to the modern times! This is one of my favorite subjects for outreach events since it uses a "catchy" subject as a means to talk about philosophy and science. The turning points in the history of the debate of alien life are following closely the changes in the cosmological ideas, the development of sciences, and now the technology!