What is ageing? In 1900, the global average life expectancy was 31, today it's 70, and the number of people over 85 in the UK is predicted to double in the next 20 years. How has ageing evolved, and do we know what is happening in our cells as we age? Professor Richard Faragher, University of Brighton, explains.

Sticking plaster-like needle replacement Microneedles on a sticking-plaster-like patch may be the painless and safe way doctors will test for drugs and infections, and give vaccinations in the future. Roland Pease tries an alternative to the traditional injection at Queen's University Belfast with Dr Ryan Donnelly.

Science of fire It's November, and these are the days when you may well have a smouldering bonfire in your back garden. Marnie Chesterton meets scientists whose lives are devoted to the behaviour of fire.

Comet landing mission nears The Rosetta Mission is entering the final stages before landing on a comet. By this time next week, we will know if the European Space Agency has successfully achieved what could be an extraordinary feat. Paolo Ferri, Head of Mission Operations at the European Space Agency, outlines the challenge.

Dr Stronzo and other cases Dr Stronzo Bestiale made his debut in the world of scientific publications in 1987, authoring a paper entitled 'Diffusion in a periodic Lorentz gas', in the Journal of Statistical Physics. However, he doesn't exist. This phantom physicist is not an isolated incident: Mike Holderness at New Scientist has been tracking scientific author apparitions for some time.

Producer: Marnie Chesterton Assistant Producer: Jen Whyntie.

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