What is a sinkhole and how does it form?

Esme StallardClimate and science reporter, BBC NewsPA MediaAn aerial view of the dramatic scene at Godstone High Street, Surrey, where sinkholes have opened upResidents in the Surrey village of Godstone have been evacuated after two sinkholes opened up this week along large parts of the high street.The original hole first appeared late on Monday night, growing to at least 65ft (20m) long by Tuesday…