Coming to a hotel or hospital near you may be a robot that makes deliveries. Companies are creating robots to help with the workload and make human workers more efficient. One such company is Silicon Valley-based Savioke. VOA’s Elizabeth Lee met a couple of its robots at a hotel in Las Vegas.
Projecting three-dimensional (3D) images in thin air, called holography, moved from science fiction to reality a long time ago. But this type of graphic display is not in wide use because the required equipment is still expensive. Scientists at the Brigham Young University have discovered a cheaper method of holography, using particles floating in the air. VOA's George Putic reports.
Although long replaced by more efficient types of engines, steam-powered machines still have a certain appeal, and not just for museum-goers. In Britain, the country that gave us both the steam engine and the legendary off-road vehicle the Land Rover Defender, one inventor combined the two, much to the amusement of technology enthusiasts. VOA's George Putic has more.
According to the World Health Organization, 2.1 billion people do not have access to safe drinking water. Many of them rely on wells and streams, making testing the water for bacterial contamination of crucial importance. However, cheap and reliable testing equipment is often not available or not affordable. Scientists in Britain and elsewhere are working on a simple, paper-based test that can confirm that water is safe in a matter of seconds. VOA's George Putic reports.