Do you ever wonder why it feels so good to be outdoors, in the woods, on the water and especially around waterfalls? Negative ions might be the answer. Negative air ions are actually positive ...

I’ve always enjoyed visiting Niagara Falls. Watching that mass of water hurl over the edge and crash onto the rocks below is an awesome sight. But it may be more than that. Breathing the air around ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Ankur Gupta receives funding from NSF. Modern life relies on electricity and electrical devices, from cars and buses to phones and laptops, to the electrical systems in homes. Behind many of these ...