The Namib desert gets less than a half an inch of rain per year, yet the stenocara beetle manages to survive in these punishing conditions. The beetle's secret lies in an array of microscopic bumps and valleys on its shell. The bumps are hydrophilic (water-attracting) and the valleys are hydrophobic (water-repelling). During foggy days, tiny water droplets accumulate on the hydrophilic bumps. Once a droplet is big enough, it tumbles off the bump down into a hydrophobic trough, which funnels the water to the beetle's mouth. Now, a company called NBD Nano is hoping to mimic stenocara's shell to create the world's first self-filling water bottles.
NBD Nano co-founder Deckard Sorenson says that "We see this being applicable to anything from marathon runners to people in third-world countries, because we realize that water is such a large issue in the world today, and we want to try to alleviate those problems with a cost-efficient solution.” According to him, this technology could harvest three liters per square meter per hour in an area with 75% humidity. Unfortunately, the self-filling water bottle is still years from being realized, if ever. For those of you who are impatient for a solution to the world's water crisis, GrabCAD is holding a contest to design devices that harvest water from the air.
Story via BoingBoing. Image via GrabCAD.