At science conferences, scientists often give oral presentations or they present their research in poster form. I'm giving a poster presentation this fall at the American Geophysical Union Fall Meeting in San Francisco on my new Global Climate Change course. Today I started gathering materials for my new poster. I highly recommend making your poster using a previously designed poster template. They are located on this webpage and they are free.
Here's the poster I presented in 2009, which was not made using a template, which means it took more time than necessary. You can see a larger version of it here.