Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com. Why is water wet? – Philip S., age 12, ...

Water is everywhere. It covers over 70% of the Earth’s surface, and it’s an essential component of life. It’s in the air we ...

Infinitely useful, water is often taken for granted until it’s either not there or there is too much of it. Droughts, floods or contaminated drinking water make headlines. But for most of us, filling ...