Good or bad? Useful or just an annoyance? Bridget Kendall and guests discuss dust and ash.
Meet the New Zealand farmers who rescued their cattle from a 7.8 magnitude earthquake
Roland Pease reports on the continuing threat of earthquakes in southeast Asia.
Patrick Aryee meets people who 'listen' to sounds beyond the human range of hearing.
Tom Heap meets the scientists trying to lessen the impact of volcanic eruptions.
What impact has the twin earthquake disaster had on Nepalese religious beliefs?
Brian Cox, Robin Ince and special guest Jo Brand look at the science of volcanoes.
Could volcanoes be unlikely allies in the fight against climate change? Tom Heap reports.