More lectures to watch

Greenland and Antarctica are distant, unfamiliar places. We hear of giant icebergs breaking away, glaciers crumbling: but how much we do know about the fate of these great ice sheets?

"Everything happens somewhere" will be brought to life in this illustrated conversation demonstrating the power of geography to save and transform lives, working through such charities as MapAction and Addressing the Unaddressed.

After a decade of work in West Papua, BBC presenter and journalist Will Millard was diagnosed with PTSD. This talk details both his work and trauma, and describes how a love for water has helped him recover.

Seeking adventure and stories to inspire young people, Sarah set out from London in 2011 to circle the northern hemisphere – travelling 25,000 miles – using a rowing boat, a bike and a kayak.