Alkaline. Electrolyte. Flavored. Walk down the beverage aisle and you'll find all kinds of waters promising extra health ...

Can old water make me sick? What happens to H20 when it sits around isn't always pretty. What happens to H20 when it sits around isn't always pretty. Sign Up for Our Ideas Newsletter POV.

"We can observe the old water paradox here as well," the environmental engineer explains. Even after a heavy thunderstorm, the major share of the water in the Holderbach stream is older than one ...

SOMMER: This century-old system of water rights is being tested across Western states, including on the Colorado River, where a two-decade-long drought is causing big shortages.

Most of the water Solomon’s lab tests is less than 100 years old. The age of the water is determined by measuring tritium, a radioactive isotope of hydrogen.