The second day of the “Neutrino Conference XIII” in Venice was dedicated to, well, neutrino telescopes. I have written down in stenographical fashion some of the things I heard, and I offer them to those of you who are really interested in the topic, without much editing. Besides, making...

The paper by Thomas Gehrmann and collaborators I cited a few days ago has inspired me to have a closer look at the problem of understanding the features of extensive air showers - the phenomenon of a localized stream of high-energy cosmic rays originated by the incidence on the upper atmosphere of a...