discusses how uranium has shaped the 20th century, a new climate change map, and looks at synthetic vocal chords

Amir Aczel tells us about how the radioactive element uranium has helped shape the 20th century. He also explains how much of the metal is needed for a bomb. His book is called Uranium Wars.

In the newsjam, the team looks at the latest revelations over fossil Ida.

Robert Langer from MIT in Massachusetts tells us about work on synthetic vocal chords which could help Julie Andrews sing again.

We were at the launch of the Science Museum's new climate change exhibit. We speak to the museum director, Chris Rapley.

At that event, the UK government unveiled a new climate change map. We speak to the government's chief scientific adviser, John Beddington, as well as Dr Vicky Pope, head of climate change advice at the Met Office.

The foreign secretary, David Miliband, and his brother, the energy and climate change secretary, Ed Miliband, were there and described what the world would be like after a 4C rise in temperature.

Watch a video of the event.

Here is the full audio from the launch event in the latest Science Weekly Extra podcast.

Science correspondent Ian Sample, environment correspondent David Adam and James Randerson are also in the studio.

Post your comments about this programme below.

Join our Facebook group.

Listen back through our archive.

Follow the podcast on our Science Weekly Twitter feed and receive updates on all breaking science news stories from Guardian Science.

Subscribe free via iTunes to ensure every episode gets delivered. (Here is the non-iTunes URL feed).