In this edition: Radiation research five years on from Fukushima, food research at the latest Fringe event and aurora adventures.

The podcast is presented by Gareth Mitchell, a lecturer on Imperial's Science Communication MSc course and the presenter of Click Radio on the BBC World Service, with contributions from our roaming reporters.

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News: Baby formula false claims and dinosaur discoveries – A huge new study concludes baby formulas marketed as reducing allergies actually make no difference, and a forgotten dinosaur bone in a museum leads to a big find.

Five years since Fukushima – In the five years since the Great Tohoku earthquake in Japan and subsequent meltdown of the Fukushima nuclear power plant, what have we learned about the radiation released?

Future food – At the latest Fringe event we caught up with researchers tackling obesity with a chemical that acts like fibre to make you feel full; combatting malnutrition at the level of schools and communities in rural Africa; and making the ultimate cookie using models of mouth sensation.

Searching for the Northern Lights – Dr Melanie Windridge set off on a journey to discover the science and soul of the Northern Lights for her latest book Aurora. Hear about some of her adventures and what she learned along the way.