In this edition: Join the race to develop a Covid-19 vaccine, check in on the Sustainable Development Goals, and discover how to argue with a racist.

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News: Solar Orbiter lift-off and cutting contrails – We follow Imperial’s instrument aboard the Solar Orbiter spacecraft as it takes its first data in space , and find out how altitude changes of just 2000 feet can cut the environmental impact of aeroplane contrails.

The race to develop a Covid-19 vaccine – We meet the Imperial team, headed by Professor Robin Shattock , developing a new kind of vaccine that could be available to people far faster than in previous viral outbreaks.

Progress in the Sustainable Development Goals – Dr David Nabarro , co-director of Imperial’s Institute of Global Health Innovation, helped set up the UN’s Sustainable Development Goals. He tells us how much progress we’ve made, and where there is still work to be done.

How to argue with a racist – Geneticist and science communicator Dr Adam Rutherford explains how science has been misused to justify bigotry and racism, and how we can fight back.

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