BBC: Britain is likely to face the strange and disturbing threat of more sinkholes opening up in the weeks and months ahead.
The warning comes from the British Geological Survey (BGS), which has been studying a recent spate of collapses across the country.
In a typical year, geologists would expect to see one or two sinkholes appearing, but this month's tally has reached six so far.
Dr Tony Cooper of the British Geological Survey told me that some areas of the country are more susceptible than...