Simon Rogers is a data journalist, writer, speaker. Author of Facts are Sacred published by Faber & Faber and a new range of infographics for children books from Candlewick. Data editor at Twitter, San Francisco. Simon edited and created guardian.co.uk/data, an online data resource which publishes hundreds of raw datasets and encourages its users to visualise and analyse them – and probably the world’s most popular data journalism website. He has also been a news editor at The Guardian, working with the graphics team to visualise and interpret huge datasets. In May 2013, he joined Twitter in San Francisco as the organisation’s first Data Editor working to tell stories from billions of tweets.