“If you can't explain it to a six year old, you don't understand it yourself.”Writing is hard. Writing about complex concepts is even harder. Writing about complex concepts with little writing training, that's research communication. And while research writing is difficult and often under-taught, it is critical to the success of a researcher and research. Implicit in the dictum publish or perish, is that you must write. Researchers write papers, syllabi, grants, progress reports and a variety of different documents on a daily basis. Yet researchers don't typically write for the public...or for fun. Today, we'd like to change that, with the Up Goer Five Challenge! A contest that challenges researchers to use only the ten hundred most common words to explain their research. We're offering everyone that participates in the Upgoer five challenge a free premium membership on Authorea for a year! We think such a challenge is great for PIs, postdocs, students, and anyone doing research and it is great for the community and public. We also think it's quite fun!To enter, follow these steps:Signup at authorea.com/signup to create an account.Upon signup, select the group "Up-Goer Five" to join the challenge.Describe your research using the ten hundred most common words with the Up-Goer five text editor. Copy and paste your entry into a public Authorea document.Hit "Publish" on the toolbar to publish your document to the Up-Goer five group.Assign a digital object identifier (DOI) to make it citable.Share it socially and challenge your friends! (#upgoerfive)