Explanation:

A new house has been erected in a town outside Moscow (Russia), but this home was not built in the traditional sense — it was constructed with 3D printing. The first 3D-printed residential home, engineered by the tech startup Apis Cor, took less than a day to construct and cost under $11,000 to complete. A mobile 3D printer created the building's concrete walls and partitions as a fully connected structure, rather than printing the building in panels at an off-site facility as is usually done, the company said. The portable machine was then removed from the building, and a group of contractors completed the home — adding the roof and windows, and finishing the interior.