When scientists search for life on other planets, they first look for the presence of water. After all, the laws of nature say that life as we know it needs water to exist and thrive.

Drinking water serves us earthlings in many ways. It helps deliver nutrients to cells, regulates body temperature and blood pressure, prevents infections, and keeps organs functioning correctly. It’s probably no surprise, then, that adults who stay well hydrated appear to be healthier and develop fewer chronic conditions. Conversely, prolonged dehydration raises the risk of conditions like urinary tract infections, kidney stones, and constipation. Dehydration also can interfere with cognitive functions like attention and memory.