If you can't get to a beach this weekend, you can still see waves. Just look up.
Clouds, after all, are sculpted by waves of air. These clouds, in Birmingham, Ala., were formed when two layers of air — one fast, the other slow — collided at just the right speed to create rises and dips that caused the clouds to curl in on themselves and crash, just like waves on a beach.
Originally published on Fri July 19, 2013 10:53 am
Thomas Edison famously said that genius is 1 percent inspiration and 99 percent perspiration — words that could well apply to a new machine promoted by UNICEF that turns human sweat into drinking water.
The Sweat Machine extracts moisture from worn clothes by spinning and heating them, then filters the resulting liquid so that only pure water remains. It was built by Swedish engineer and TV personality Andreas Hammar, and uses a technology developed by Sweden's Royal Institute of Technology and the water purification company HVR.
Researchers at the University of Puerto Rico have developed a system that can automatically record and analyze sound clips from the field. Mitch Aide, lead researcher on the project, describes how the system can improve biodiversity monitoring.
In 2009, Alaska's Redoubt volcano erupted and sent plumes of ash miles into the air. But underground, there was even more activity. In a study published in Nature Geoscience, researchers say the volcano experienced a large number of pre-eruption earthquakes that created a "scream."
Ever tried to make your own sunscreen? A water bottle rocket? How about a cardboard canoe? Eric Wilhelm, founder of Instructables, and Mike Szczys, managing editor at Hackaday.com, discuss their favorite do-it-yourself summer projects. And Bon Appetit's Andrew Knowlton suggests some cooking hacks, like "cooler corn" and turning your BBQ into a smoker.