What Are Sinkholes and How Do They Work?
by Beth Skwarecki from Lifehacker on (#4XXCA)
A sinkhole opened up and swallowed a bus this week in China, killing several people. A few months ago, another sinkhole opened up below a bus in my hometown of Pittsburgh; in that case, though, everybody escaped safely. Besides buses, sinkholes can also swallow cars, pedestrians, and houses. Here's the rundown on what"