A Michigan man was doing some home improvements and found an odd material while doing some demo work.
David Olson was replacing his concrete slab steps at the back door and inside it was 120 bowling balls. They were packed in sand and gravel in the concrete shell. While he won’t reuse them for the new steps, Olson is excited to figure out how to upcycle the finds. Luckily they aren't considered an environmental hazard.
He still has no idea why someone added the odd fillers to the steps.