Things that happened this week: nothing to hide, still a lot to fear.

Thanks to Durham police for clearing this one up. Having your DNA taken could harm your prospects even if you're an innocent person. A police person was quoted this week on the issue of mephedrone, a substance which it is legal to be in possession of. "In Durham police have taken a stance and anyone found with it will be arrested on suspicion of possession of a banned substance.... They will be taken to a police cell, their DNA and fingerprints taken and that arrest, depending upon enquiries, could have serious implications for example on future job applications". This revelation comes courtesy of the Register.

Darwin, climate, DNA and ID cards

Darwin's Origin of Species was apparently published 150 years ago today.

Our ability to understand science hasn't increased by much since then judging by the cranky arguments put forward by climate change deniers.

On the other hand the British public is showing an admirable sense of scepticism about ID cards - only 538 early adopters have signed up for one so far.

But then they probably have your DNA anyway.