researchers at ETH Zurich have let an autonomous excavator loose on a big pile of boulders and reclaimed concrete. The goal? To build a 20 foot (6 meter) and 213 ft (65 m) long dry-stone wall as ...

A dry stone wall constructed using irregular, unprocessed boulders will contain small gaps. It needs to be examined, whether those gaps are an issue when the wall is used as a blast shield.

This $29.8 million estate with an indoor and an outdoor pool, plus a theater, is the most expensive home for sale in Boulder, ...

The CU Boulder Campus Architect is responsible ... Thickness varies from 3/4 inch up to 5-6 inches. Each stone is laid flat with its fractured face extending varying distances beyond a vertical wall ...