MARK HENDERSON is science editor of The Times. He graduated in modern history from Oxford University in 1996. After a brief spell working for the Sunday Express he joined The Times as a graduate trainee. He spent time as a general reporter, a leader writer, and covering health education and social affairs, before being appointed science correspondent in August 2000. As well as covering science for the news pages, he writes the Saturday Junk Medicine column, which aims to cast an evidence-based eye over the latest health stories, He is the author of 50 Genetics Ideas You Really Nee To Know.