They obviously used this, https://www.theguardian.com/science/the-lay-scientist/2010/s..., as their guide on how to write up the story.

Having said that, the original source for the story was the very first search result for "data centres 9 degrees celsius": https://www.newscientist.com/article/2521256-ai-data-centres.... And it's in New Scientist so there's proper data, and a link to the actual publication, which is https://arxiv.org/abs/2603.20897.