7 – On Thin Ice

Original air date: 7 December 2011

Different from second part of last episode this one deals with the biological sciences

A graphical timeline of the episode is available below

The timeline below gives a more thorough idea about what is going on in the episode

More episodes

1 - To the Ends of the Earth
2 - Spring
3 - Summer
4 - Autumn
5 - Winter
6 - The Last Frontier
8 - Science at the end of the earth
9 - The Epic Journey
Series in retrospect