David continued his work on the steps, but 30 seconds later he stood up in surprise again. More bowling balls. He kept going. For the rest of the afternoon, Olson shoveled out sand and bowling balls.

Michigan Homeowner Mystified by Discovery of Over 150 Bowling Balls Under House During Renovation "It became mind-blowing," David Olson told WLTX. "A few of them look like alien eggs." ...

It turns out bowling balls aren’t a great foundation for a house. David Olson, 33, is learning that firsthand now that he’s discovered the home he purchased in Muskegon, Michigan two years ago ...

David Olson, 33, was demolishing the back steps of his house on the morning of July 1, when he saw a black sphere buried in the sand behind some cinder blocks. "That was one of the bowling balls.

David Olson, 33, was demolishing the back steps of his house on the morning of July 1, when he saw a black sphere buried in the sand behind some cinder blocks. "That was one of the bowling balls.