ClimateX is the kernel that gave rise to the MIT Climate portal, the result of collaboration between MIT alumni and MIT Open Learning. ClimateX was conceived in 2016 as an open online space for climate change learning, connection, and action, by two MIT alumni Rajesh Kasturirangan and Dave Damm-Luhr. After winning a Climate CoLab contest, they began a partnership with MIT Open Learning to implement their vision and engage people both within MIT and in the wider world. Rajesh and Dave joined with Open Learning’s Curt Newton to develop the ClimateX concept and content, including a widely-circulated climate change podcast, video interviews, numerous posts and opinion pieces, and prospective project partnerships with groups outside of MIT. The Open Learning “Hive” team of Mark Brown, Laura Howells, Nick Covaleski, and Mikaela Joyce developed the web platform, built a social media presence, produced written interviews, and developed deeper collaborations with other MIT climate groups, which led to the September 2018 launch of the MIT Climate portal. Read more about that transition at https://climate.mit.edu/climatex-becomes-mit-climate-portal.