On this page I'll explain how to use Canva to get a great science poster design. Good to mention beforehand: this is a tutorial about using Canva for your design. If you want to learn how to create a concept/idea for a science poster or visual, you can find this knowhow in the Science Poster Design Guide. After that, you can for example use a tool such as Canva to create the final design.
You are done, congratulations with your science poster!