We've been using cement as a building material for thousands of years — but never quite like this. Andrey Rudenko of Minnesota used it in a custom 3-D printer to create a tiny castle in his backyard, ...

A building contractor living in Minnesota has developed his own 3D printer which can print concrete directly from CAD design software, and he has used it to 3D-print a castle in his back garden.

Though 3D printing technology is still relatively new, it may become an important tool for architects and the construction industry, as highlighted by projects like the recent 3D-printing of 10 homes ...