What causes sinkholes

Published On: Aug 12 2013 01:48:02 PM EDT   Updated On: Mar 26 2015 03:46:05 PM EDT

In March 2015, a sinkhole swallowed a tour bus in northern Brazil. The incident happened near a flooded river. Everyone aboard escaped safely. Take a look at what causes a sinkhole and some other notable sinkholes that have made headlines.

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In March 2015, a sinkhole swallowed a tour bus in northern Brazil. The incident happened near a flooded river. Everyone aboard escaped safely.

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