In this edition: On the ground at COP22, the role of biotechnology in the fourth industrial revolution, and debunking a popular water theory.

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: Earthquake shields, challenging Einstein and the 20-year legacy of Dolly – Physics gets weird as scientists propose making buildings ‘invisible’ to earthquake waves and pose a theory that Einstein has it wrong about the speed of light. Plus the world’s first cloned mammal is celebrated with an unusual sculpture.

On the ground at COP22 – Imperial researchers were out in force at the annual climate conference, where scientists from around the world discussed how to move forward with the agreement from Paris last year.

The future of biotechnology – The World Economic Forum has convened Global Future Councils to help it define the fourth industrial revolution. Dr Diego Oyarzún, one of Imperial’s representatives, joined the council for the future of biotechnologies this year.

Debunking a popular water theory – The idea that water freezes faster when it’s warmer has been around for centuries, and is popular thanks to experiments in the 1950s. Now, Imperial researchers have finally proven it to be incorrect - so why did it take so long to disprove such a counterintuitive theory?