NPS investigating why Indiana dune swallowed boy

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The National Park Service says it will use special equipment to study the ground beneath an Indiana sand dune to try to determine why it swallowed a six-year-old Illinois boy.

Bruce Rowe is a ranger at the Indiana Dunes National Lakeshore. He says a team of geologists and others will meet Thursday to discuss what equipment could show what's under the sand at the huge dune known as Mt. Baldy.

Nathan Woessner remained in critical but stable condition Wednesday at Chicago's Comer Children's Hospital.

He fell into a hole at the dune on Friday and was trapped for more than three hours beneath 11 feet of sand.

Rowe says rescuers found decayed bark when they reached Nathan, indicating that a decayed tree trunk might have caused the hole.

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7/17/2013 12:18:25 PM (GMT -4:00)