On What's Trending, a battery-operated spoon in Japan has been launched to help people reduce their salt intake. The spoon, made of plastic and metal, uses a weak electric current to concentrate sodium ion molecules on the tongue, thereby magnifying the perceived saltiness of food by one and a half times. Also, 3D printing technology is revolutionizing the construction industry, from building the world’s largest 3D-printed neighborhood in Austin, Texas, to addressing housing shortages in Maine.