Thinking about the sun leads to device that could help in hospitals, high-traffic areas When Grant Edwards sees a heap of roller-skate wheels, a towel ring and a singing-toothbrush battery,... Read more
Some of the worms and germs we’ve been warding off may actually keep us well. One solution, some scientists say, is to welcome them back I met William Parker just two days before World Toile... Read more
We know it’s bad news for the environment (and our health) to use cleaning products that contain nasty chemicals, but until now, there have not been a lot of viable alternatives. Enter the A... Read more