Dr Adam Rutherford is a geneticist, author and broadcaster. He hosts the BBC Radio 4 programme 'Inside Science' and has published books related to genetics and the origin of life. (Subscribe: https://bit.ly/C4_News_Subscribe) In his most recent project, he confronts the use of science to strengthen racist ideologies. He talks to Krishnan about how if we understood genetics and history correctly they could become powerful allies against racism. ------- Watch more of our explainer series here - null. Get more news at our site - https://www.channel4.com/news/ Follow us: Facebook - https://www.facebook.com/Channel4News/ Twitter - https://twitter.com/Channel4News