Hello! We are happy to announce the fifth edition of our Transatlantic Behavioural Neuroscience School! This year we are coming back to Nencki Research Station in Mikołajki. We have one: to teach young researchers everything they need to design and build their own behavioural setups, conduct complex experiments and analyze their data using open software and hardware. Our school is divided in five blocks: - *3D printing*, where you will have an opportunity to learn the theory necessary to take full advantage of this technique and how to use Autodesk Fusion software to design elements of your behavioural setup - *Electronics and Arduino*, that is intended to provide the skills necessary to understand the design of devices used in behavioural research; it will also teach how to build and program such devices - among others, optogenetics laser controllers, automated doors, stimulus delivery systems and devices used for synchronizing data streams - *Bonsai* module that aims at teaching you how to use Bonsai to track your animals, conduct closed-loop experiments with Arduino and analyze your data - *Deeplabcut* *and machine learning*, where you will gain an in-depth understanding of the DL tools used in behavioural science and learn how to apply them to extract interesting information from your data - *Project* is the module where you will apply all the knowledge gained during the course to build a 3D-printed setup for studying phototactic behaviour in Drosophila, conduct experiments and analyze the data School will be also composed of a series of lectures by researchers studying animal behaviour on different model systems and with different approaches. PhD students and early-stage researchers are especially encouraged to apply. *We provide partial or full travel grants and fee waivers for participants who cannot cover the costs. *This year,*thanks to collaboration with FENS*, European students will be also able to obtain travel grants and fee waivers. Please find more info here - https://nenckiopenlab.org/tbnss2026/. Best, Mateusz Kostecki -- --- Mateusz Kostecki PhD Student Knapska Laboratory Nencki Institute 02-093 Warsaw, Pasteura 3, Poland https://twitter.com/mtkostecki https://evolvingbehavior.blog/