Dear Colleagues, We are happy to announce the launch of the World Wide Theoretical Neuroscience Seminar (WWTNS). WWTNS is a weekly digital seminar on Zoom targeting the theoretical neuroscience community. Its aim is to be a platform of exchange among theoreticians. Speakers have the occasion to talk about theoretical aspects of their work which cannot be discussed in a setting where the majority of the audience consists of experimentalists. The seminars are 45 min long followed by a discussion and are held on Wednesdays at 5 pm in Western Europe, /i.e./, 11 am EST. The talks are recorded with authorization of the speaker and will be available to everybody on our YouTube channel. The first seminar will be on *November, 4, 2020 at 11am EST.* The speaker will be Larry Abbott (Columbia University). The title of his talk is: /Vector Addition in the Navigational Circuits of the Fly/// The abstract of the talk is available on the WWTNS website: http://www.wwtns.online/ *To participate in the seminar you need to fill out a registration form https://www.wwtns.online/register-page after which you will**receive an email telling you how to connect.* We would be grateful if you could forward this email to all those who may be interested. Looking forward to seeing you soon, David Hansel & Carl van Vreeswijk