Including Original "Paul H. Letters" Copyright © 1996-2017 Paul V. Heinrich - All rights reserved.



Wednesday, 8 May 2013

Understanding sinkholes

Understanding sinkholes

Understanding sinkholes. CBS Sunday Morning, May 5, 2013
http://www.cbsnews.com/video/watch/?id=50146208n

"When a cavity in the subsurface of the Earth collapses,
it's called a sinkhole. They swallow cars and homes,
even entire neighborhoods."

Yours,
Paul H.