One clay brick costs Shs250. If one needed 10,000 clay bricks you are likely to spend Shs2.5m. Yet with a brick making machine you can actually make your own bricks at the construction site thus ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...