Today is World Water Day. This year’s theme is “Water for Cities.” Yes, you can still attend all manner of walks, photo contests, screenings, and other events supporting global access to clean water. We’ve highlighted some noble projects for delivering drinking water in the past, but today we bring you you news of a new technology designed especially for disasters.
The HTI HydroPack is like an empty Capri Sun pouch with powdered nutrients inside. But it’s really a filter you can drop in any water source—a swimming pool, a mud puddle, a contaminated aquifer—and eight to twelve hours later the pack has filled itself with potable, fortified water. Далее
The Earth is one of those extremely rare, special places in the Universe where water can exist, stably, as a liquid. So much of it exists here on Earth, that if you were to add up all the oceans on Earth together, it would weigh more than 10^18 tonnes, more massive than the biggest asteroid ever, and about as massive as Pluto’s giant moon, Charon.
But water only has a very small window in which it can be a liquid. For instance, if you took some warm water up to a very high elevation, it would start to boil, and become a gas! The higher up you took it, the lower and lower your boiling point would be. Далее
PASADENA, Calif. — Using data from the Herschel Space Observatory, astronomers have detected for the first time cold water vapor enveloping a dusty disk around a young star. The findings suggest that this disk, which is poised to develop into a solar system, contains great quantities of water, suggesting that water-covered planets like Earth may be common in the universe. Herschel is a European Space Agency mission with important NASA contributions.
Scientists previously found warm water vapor in planet-forming disks close to a central star. Evidence for vast quantities of water extending out into the cooler, far reaches of disks where comets take shape had not been seen until now. The more water available in disks for icy comets to form, the greater the chances that large amounts eventually will reach new planets through impacts. Далее
Tower 37 siphons every drop of water from a once-pristine lake, that is, until the station’s steward realizes that it is slowly destroying an entire ecosystem.
The Incident at Tower 37 (2009) is a ten-minute HD animated film, written and directed by Chris Perry and produced within the collaborative animation curriculum at Hampshire College. Далее
There’s a whole lot of water on Earth! Something like 326,000,000,000,000,000,000 gallons (326 million trillion gallons) of the stuff (roughly 1,260,000,000,000,000,000,000 liters) can be found on our planet. This water is in a constant cycle — it evaporates from the ocean, travels through the air, rains down on the land and then flows back to the ocean.
The oceans are huge. About 70 percent of the planet is covered in ocean, and the average depth of the ocean is several thousand feet (about 1,000 meters). Ninety-eight percent of the water on the planet is in the oceans, and therefore is unusable for drinking because of the salt. About 2 percent of the planet’s water is fresh, but 1.6 percent of the planet’s water is locked up in the polar ice caps and glaciers. Another 0.36 percent is found underground in aquifers and wells. Only about 0.036 percent of the planet’s total water supply is found in lakes and rivers. That’s still thousands of trillions of gallons, but it’s a very small amount compared to all the water available. Далее