Engineers have developed a new sponge that can remove metals -- including toxic heavy metals like lead and critical metals like cobalt -- from contaminated water, leaving safe, drinkable water behind.

Who doesn’t love a refreshing water fight on a hot day? Besides the hose, you can up your arsenal with kitchen sponge water bombs. And unlike balloons, these can be used over and over. You can make ...

How the New Material Works The device, made from refined balsa wood, works like a high-tech sponge. It captures moisture from the air and, when heated by the sun, releases it as clean water into a cup ...