Pristine water: the solar absorber gel purification system in a lake at Princeton University (left) and the clean water produced during its immersion. (Courtesy: Xiaohui Xu) Pufferfish have inspired a ...

If you need to filter some water for drinking or cooking, this DIY solution uses the power of the sun. In this video from the MAD Science Hacks YouTube channel, you’ll learn how to create a simple ...