Manage episode 293603124 series 2006452
Sand is one of the most in-demand natural materials on the planet—some 50 billion tons of sand and gravel are mined every year. It’s because the humble sand is a key ingredient in many materials, from concrete and asphalt to microchips and glass. But sand is also heavy, needed in large quantities, and costly to ship—meaning that in some regions, local demand for sand outstrips supply. A ‘sand mafia’ exists in parts of the globe, and in others, international conflicts have arisen over accusations of illicit cross-border beach theft.Dr. Aurora Torres, a postdoctoral researcher in Michigan State University’s Center for Systems Integration and Sustainability and at the Catholic University of Louvain, joins host John Dankosky to talk about ways to make the business of sand extraction more ecologically-friendly—from manufacturing sand via high-tech rock crushing machines to reducing demand by recycling construction materials.A Trip Back In Time With Jane Goodall
On September 27, 2002, Ira sat down for his first interview with the pioneering conservationist and primatologist Jane Goodall, to hear about her life, work, and vision for our relationship with our environment. Goodall is the 2021 recipient of the prestigious Templeton Prize for her work with animals and her contributions to humanity.
When this interview originally aired, Goodall was already 40 years distant from her initial breakthrough discovery of tool use in chimpanzees, was the subject of a newly released IMAX movie, and had just been named a UN Ambassador for Peace.
Learn more about her in the latest Science Friday Rewind, a series exploring historic interviews and scientific discoveries captured in our audio archives.A Bowl Full Of Pasta Engineering
When you walk down the pasta aisle at the supermarket, there are so many tasty choices: There’s the humble spaghetti, the tubes of ziti, the tiny shells, and the butterfly-like farfalle. But every pound of pasta is not created equal—some of the boxes pack mostly air.In recent work published in the journal Science Advances, Dr. Lining Yao of Carnegie Mellon’s Morphing Matter Lab and her colleagues discuss an innovative way to solve the problem of puffed-up pasta boxes: What if different pasta shapes could be flat-packed into containers like DIY IKEA furniture? The researchers developed a way to map out tiny grooves and ridges on the surface of a flat noodle sheet. When the pasta is cooked in hot water, it swells at different rates around the ridges and grooves, causing it to fold on its own into shapes such as boxes, rose-like flowers, and helix curls. Yao joins SciFri’s Charles Bergquist to talk about the research, and the challenges of making your dinnertime pasta plate into an origami craft project.How To Take A Bite Of The Brood X Cicada Swarm
After 17 years underground, billions, maybe even trillions, of cicadas are finally emerging in a group that scientists are calling Brood X. The cicadas will mate and die all within about six weeks—filling the air with a collective hum, and leaving behind their exoskeletons.
For some this might sound like a horror movie, but for Bun Lai, chef at Miya’s Sushi in Connecticut, he sees this as an opportunity for a sustainable snack. He talks about how to hunt and cook a cicada, and how they fit in as a sustainable food source.