We're here in our new council chamber for the Widefield City Workshop, so the city is the search for extraterrestrial intelligence. Basically, what we do is use technology as a proxy for intelligence. If we detect some electromagnetic emission that comes from another technology, we can infer the presence of other intelligent life elsewhere in the universe. So far, we haven't really been very successful, but we've been completely unsuccessful. So this is an opportunity, especially radio-related city searches, to think about what we've done in the past, but perhaps think about how we can do it better in the future. Rather fittingly, the first talk at the first event was by Professor Jocelyn Belbrunel, who famously discovered pulsars. Probably a perfect example of someone making a large discovery while trying to do something else. I think the biggest challenge is not just focusing on the things you know about, but taking note of any other hints that there are in the data, a lot of which will have terribly mundane explanations, you know. But in amongst that, there might be some signals that are worth retrieving. And as we go to much larger databases and the analysis is basically done online by a computer, we run the risk of the computer only finding what we tell it to look for. We have the Breakthrough Lissin program, been run from Berkeley, that's funded by Yuri Milmer, an entrepreneur in the US. And that is sort of also transforming radio-city. There are large amounts of observing time on the largest telescopes in the world, but for the first time are dedicated to city. And also, there are really for the first time systematic surveys been done. Private philanthropy brings quite a lot to the table, of course, funding is very important, but also relationships with industry, technology companies in particular, is something that can bring very important technical capabilities to the field as well. What kind of signals are you looking for? We don't know. But the SKA is designed with quite a bit of flexibility. From the offset, it was designed to do multiple things at once or simultaneously. So, set the observations would fit in in this similar way. You know, I'm an optimist, so I'm hopeful that we'll succeed. But ultimately, we don't know until we look. And that's in fact the only way that we're ever going to answer this question is by actually conducting these experiments. It's definitely the definition of a high-risk, high-reward type of search. In the process, we'll develop new ideas, new techniques that can be used in other places as well. So, even if we don't find setting, it's not wasted effort. We'd be mad not to do it. Even if the chances of success are very, very small, if we were to succeed, it would be the biggest discovery ever.