We're looking forward to hearing @calestous talking about Africa and science on #BBCmaterialworld on July 7th - http://news.bbc.co.uk/1/hi/sci/tech/4657963.stm …
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@calestous Oh really?? Oops! Even better! We can go and listen to it now.Thanks. Twitter will use this to make your timeline better. UndoUndo
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