Rare earth elements are a group of 17 metals used in a wide range of things that make modern life possible, including batteries, magnets, LED light bulbs, phone screens, and catalytic converters.These elements are essential to a green economy because they are integral to many technologies designed to have low environmental impact. However, mining these metals is a dirty, complex, and costly process. And as the world transitions towards more clean energy production, the demand for them will continue to grow.One possible solution is to recycle rare earth elements when they’re discarded in electronics waste. On stage in Ames, Iowa, Ira Flatow talks with Dr. Ikenna Nlebedim and Dr. Denis Prodius, two materials scientists from the Critical Materials Institute at the Ames National Laboratory who have developed a new acid-free method to recycle rare earth metals found in magnets.Transcript for this segment will be available the week after the show airs on sciencefriday.com.
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Covering the outer reaches of space to the tiniest microbes in our bodies, Science Friday is the source for entertaining and educational stories about science, technology, and other cool stuff.
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Folge vom 22.05.2024How To Recycle Rare Earth Elements
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Folge vom 21.05.2024New Evidence Questions Dark Energy’s ‘Constant’ NatureAfter the Big Bang, the universe expanded rapidly. And, once upon a time, conventional wisdom held that that expansion would eventually slow, dragged back inwards by the gravitational pull of all the matter in the universe. But in 1998, two groups studying supernovae discovered that not only was the universe continuing to expand, but that the expansion was accelerating.That accelerating expansion has been attributed to a force cosmologists have called dark energy. The energy itself has been represented by a number—thought to be a universal constant—called the cosmological constant. But recent data presented by a group called DESI, the Dark Energy Spectroscopic Instrument, says that possibly, the constant may not be a constant. Instead, dark energy may be evolving over time.The finding, if it holds true, would be a big deal, requiring cosmologists to redo their equations for the way the universe works and, possibly, develop new physics to explain the phenomenon. Dr. Dillon Brout, an assistant professor of astronomy at Boston University and part of the DESI collaboration, joins Ira to talk about the data from the first year of the DESI instrument, and what may lie ahead in years to come.Transcript for this segment will be available the week after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.
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Folge vom 20.05.2024New Guidelines Recommend Earlier Breast Cancer ScreeningThe U.S. Preventive Services Task Force has updated its recommendations for breast cancer screening once again. The recommendations now stipulate that women and people assigned female at birth should begin getting mammograms at age 40, and continue every other year until age 74. The previous guidelines recommended beginning screening at age 50. These guidelines carry a lot of weight because they determine if mammography will be considered preventive care by health insurance and therefore covered at no cost to the patient.Why have the guidelines changed? And how are these decisions made in the first place? To answer those questions and more Ira Flatow talks with Dr. Janie Lee, director of breast imaging at the Fred Hutchinson Cancer Center and professor of radiology at the University of Washington School of Medicine.Transcript for this segment will be available the week after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.
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Folge vom 17.05.2024New Rule Sets Stage For Electric Grid Update | Harnessing Nanoparticles For VaccinesUpgrades to the power grid under a new rule could help accommodate an increasing renewable energy supply and meet data center demands. Also, extremely small particles might help scientists develop vaccines that are stable at room temperature and easier to administer.New Rule Sets Stage For Electric Grid UpdateThe US electric grid is straining to keep up with demand. For starters, our warming climate means more electricity is needed to keep people cool. Last summer—which was the hottest on record—energy demand in the US experienced an all-time hourly peak. And even though more renewable energy is being produced, our current grid, largely built in the 1960s and 1970s, was not built to handle those needs. Increased use of AI and cryptocurrency, which require power-hungry data centers, have only increased the burden on the grid.But on Monday, the Federal Energy Regulatory Commission approved new rules to upgrade the grid to accommodate rising demands. The policy includes approval for the construction of new transmission lines and modification of existing transmission facilities.Casey Crownhart, climate reporter for the MIT Technology Review, joins Ira to talk about this and other science stories of the week, including how a recent ocean heatwave will impact ocean life and the upcoming hurricane season, a new self-collection test for cervical cancer, and how a tiny beetle uses audio mimicry to avoid being eaten by bats.Could Vaccines Of The Future Be Made With Nanoparticles?In 2021, vaccines for COVID-19 were released, a little over a year after the SARS-CoV-2 virus triggered a global pandemic. Their remarkably short production time wasn’t the result of a rush-job, but a culmination of decades of advancements in infrastructure, basic science, and mRNA technology.But despite the years of innovations that allowed those vaccines to be developed and mass-produced so quickly, their delivery method—an injection—still has some drawbacks. Most injected vaccines need to be kept cold, and some require multiple trips to a pharmacy. And people with needle phobias may be reluctant to get them altogether. So what could the vaccines of the future look like?Dr. Balaji Narasimhan, distinguished professor and director of the Nanovaccine Institute at Iowa State University, joins Ira Flatow onstage in Ames, Iowa, to talk about how his lab is using nanotechnology to develop the next generation of vaccines, and how they could be more effective than current vaccines in the face of the next pandemic.Transcripts for each segment will be available after the show airs on sciencefriday.com. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.