At least six people are dead, and 10 more are still missing after an enormous sinkhole suddenly swallowed a public bus in China on Monday. According to The Washington Post, state media reports 15 ...

, Sept. 30 -- Sinkholes are sudden holes that open up in the ground when the surface layer drops into empty spaces below. They can be as small as a dip in a garden or so big that they swallow houses, ...