The seat of the Khmer Empire in Cambodia mysteriously collapsed in the 15th century. Now a University of Cambridge Gates Scholar has pieced together its climate history and put forward a compelling new theory to explain its demise.
Over the past month, the University of Cambridge has been profiling research that addresses one of the biggest challenges of the 21st century - how to guarantee enough food, fairly, for the world's rapidly expanding population. As part of this, we asked whether you had a question that you wanted us to answer, and put them to a panel of academics who specialise in research to do with food security. Here's what they had to say. Thanks to everyone who sent questions in!
As World Water Week, an annual week-long global conference on water provision and sustainability, begins in Stockholm, Dr Douglas Crawford-Brown explains how the world needs to prepare for the consequences climate change is likely to have on people's access to this vital resource.