In-depth reporting and analysis from a global perspective. 
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Indonesian Tsunami
Picture credit: European Press Photo Agency
Earth Observatory of Singapore
The Mentawai Islands in Indonesia have been devastated by Monday's tsunami, triggered by a 7.7-magnitude undersea earthquake. Professor Kerry Sieh, Director of the Earth Observatory of Singapore, tells Quentin that this earthquake is the latest in a series which have occured in the Indian Ocean since 2000, and says he fears there will be stronger quakes to follow. -
Mount Merapi volcano eruption
Picture credit: European Press Photo Agency
Smithsonian Global Volcanism Program
As well as a deadly tsunami, Indonesia is also dealing with the eruption of Mount Merapi volcano in central Java. Quentin talks to Dr Ralf Gertisser, Lecturer in Mineralogy and Petrology at Keele University, about the cause of the latest eruption. -
The environmental cost of Space Tourism
The American Geophysical Union is warning that the environmental cost of space tourism will be greater than the $200,000 price tag passengers will be paying to travel on the Virgin Galactic spaceship when voyages begin in 2012. Marty Ross of non-profit research organisation The Aerospace Corporation in California and key author of the AGU's paper, explains why.
The Aerospace Corporation -
The first electronic valve
Picture credit: UCL
UCL: Sir John Ambrose Fleming
John Mitchell from the Department of Electrical and Electronic Engineering at University College London tells Quentin about the first electrical valve, the device which kick-started an electronic revolution.
Broadcasts
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BBC Radio 4Thu 28 Oct 2010 16:30 BBC Radio 4
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BBC Radio 4Mon 1 Nov 2010 21:00 BBC Radio 4
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