Quote of the day by SpaceX CEO Elon Musk: 'Are you prepared to die? Then okay, you're a candidate' — a reminder that the manned mission to Mars might be a deadly one

<p>Keumars Afifi-Sabet is a freelance contributor for Tech Radar and Technology Editor for Live Science. He has written for a variety of publications including ITPro, The Week Digital and ComputerActive. He has worked as a technology journalist for more than five years, having previously held the role of features editor with ITPro.