Episode details
Available for over a year
Dr Karl on why the night sky is so bright, how mobile phone networks find you and the difference between cats and dogs.
Programme WebsiteUse BBC.com or the new BBC App to listen to BBC podcasts, Radio 4 and the World Service outside the UK.
Available for over a year
Dr Karl on why the night sky is so bright, how mobile phone networks find you and the difference between cats and dogs.
Programme Website