Solar stills provide a clever and simple means of purifying dirty or salty water, but they work at a rather slow rate. A new material has been shown to boost their performance, and it's made from ...

It's a clever setup, but it only produces potable water as long as the sun is shining – even then, it's a slow process. Materials known as temperature-responsive hydrogels offer an alternative, as ...

What we use to purify water depends a lot on where the water’s coming from and what we want to do with it. If we’re going to drink water, it needs to be very clean and very safe. There are lots of ...