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A delicious solution to our energy problem
Science

A Delicious Solution to Our Energy Problems

A new source of energy is being developed by using Michigan's industrial food waste. Using existing technology for converting manure into electricity, these anaerobic digesters are doing their work on pudding packs and canned peaches, among other delicacies. Listen to learn how they are turning waste into electricity.

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Science

A New Rechargeable Battery

People rely on batteries to power our technology: laptops and phones run on rechargeable batteries. These can leak and are full of chemicals. But over time, these batteries stop re-charging, forcing us to purchase a new battery. But what if our batteries never died? A new battery was recently created that can last over 100 times longer than typical batteries. Listen to this story to figure out how one scientist has engineered a new battery.

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Toys for elephants
Science

Animal Behavior in Captivity: Toys for Elephants

Toys play an important role in children's development. They are also important to animals, even elephants. This public radio story is about how artists designed and built toys of elephants that were based on animal behavior and their environment. You’ll be inside the zoo with the elephants, hearing their joy when playing with the new toys.

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Artificial photosynthesis
Science

Artificial Photosynthesis Produces Fuel

While humans need food and water to survive, plants are able to get their energy from the sun through a process known as photosynthesis. Engineers are now trying to replicate this process of converting sunshine to power through artificial photosynthesis. They are trying to create an artificial leaf. Listen to learn how these problem solvers are approaching the challenge step by step.

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Weathering and erosion
Science

Beach Erosion Threatens Infrastructure

What happens when human structures and nature come into conflict? Ocean Beach in San Francisco is naturally eroding, but the consequence of this shifting shoreline is that a sewage treatment plant is put in peril. Without intervention, raw sewage could be dumped into the ocean. A rock wall has temporarily stabilized the pipeline, but not without complications. Now other solutions are being considered, including construction of an artificial dune.

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Bee deaths and crop consequences
Science

Bee Deaths and Crop Consequences

Over the past several years honeybee colonies have declined dramatically. There is no consensus over a single cause, and in fact, scientists point to multiple causes for this problem. An important, yet often overlooked, factor is basic land use decisions. This public radio story explores the importance of the symbiotic relationship between honeybees, flowers and humans, and what kids can do to help promote honeybees and other pollinators.

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Bees and electric fields
Science

Bees and Electric Fields

Flowers have many ways of attracting bees for the purpose of pollination. Bees are looking for nectar and pollen when they visit plants and flowers, as well as various colors, patterns and shapes. Recently scientists have discovered a new way that flowers attract bees. They can sense the electric fields around flowers. Listen to hear about the natural positive charges of bees, the negative charges of flowers, and how the electric attraction works for pollination to happen.

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Right whales
Science

Biologists Find it's Hard to Study Right Whales

Biologists studying right whales face the challenge of studying rare, extremely large organisms that spend the majority of their time underwater. This public radio story explores some of the challenges and risks of studying right whales and explores the reasons that scientists are willing to work so hard to study them. In addition, the story discusses an experiment designed to learn how male and female right whales find each other during mating season.

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Mimicking a beetle
Science

Biomimicry and a Desert Beetle

Copying the way a desert beetle gets water, scientists have designed a membrane that can extract water from the air. Since all air contains water, even in the desert, this could provide a very inexpensive way to supply drinking water. This audio story describes an application of the idea of “biomimicry,” or using ideas from nature to solve technological problems. Listen to learn how this idea can help solve the problem of scarce drinking water.

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Using grass for electricity
Science

Burning Grass for Alternative Electricity

Energy experts are thinking about ways to replace coal that’s burned in American power stations. One alternative is to burn plants because they can produce fewer greenhouse gas emissions. This is called biomass power. This public radio story looks at a movement in the Midwest that uses millions of acres of grass for biomass power.

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Science

Caffeine: Helpful or Harmful?

For such a small molecule, caffeine has long been a controversial substance. Throughout the day, the human body produces a molecule called adenosine that can induce feelings of fatigue. Caffeine is a molecule that reverses the effects of adenosine. This results in feelings of alertness. But the impacts of caffeine can be dangerous. Listen to hear what determines whether caffeine is beneficial or harmful, and how to prevent caffeine-related deaths.

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Calculating a local carbon footprint
Science

Calculating a Local Carbon Footprint

Discussion of Carbon Dioxide (CO2) emissions often occur at the national level. Nations promise to lower emissions and scientists look for alternative energy sources. But new software is providing data for this emission reduction discussion at a local level. The software allows people to have a view into their carbon emissions on the level of a city, neighborhood, block and even household. Listen to learn how scientists and local officials are working together to track and understand emissions at the local level.

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The science of calories
Science

Calculating Calories in Food

Food gives our body the energy needed to function and thrive. But what is energy? Where can you find it and how can you calculate it? This public radio story explores the energy in a cheese curl by burning it. Listen to learn about a great lab that allows you to calculate the energy in food.

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Wind chill factor
Science

Calculating the Wind Chill Factor

The first wind chill table and formula was developed before World War II. It was updated at the beginning of the 21st Century. This public radio story is about how scientists have changed how they calculate the wind chill factor. You hear from people about how they experience wind chill and why it doesn’t affect inanimate objects.

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Science

Challenger Engineer Blames Himself

Thirty years ago, the nation watched in shock as the space shuttle Challenger exploded soon after take off, tragically killing all seven crew members, including a civilian teacher. This shuttle had launched and landed successfully nine times before this tenth launch. One of the rocket engineers feels partially responsible to this day. In a recent interview, he explains that he and his colleagues had anticipated the failure, and had warned officials that conditions weren’t right for the launch. When NASA ignored their warnings, the consequences were fatal. Listen to hear more from a NASA engineer’s perspective on this tragic event.

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Manatees
Science

Changing Ecosystem Threatens Florida's Manatees

Manatees, the vegetarian aquatic mammals that inhabit the waters of Florida, depend on natural warm water springs to survive the winter. But as a consequence of greater development, those warm water sources have diminished over the years. So manatees have come to depend on the warm water discharge of power plants. But now, they face losing these man-made refuges as power plants strive to be more efficient and environmentally friendly.

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Rare earth elements
Science

China Owns Most Rare Earth Elements Used in Electronics

Rare earth minerals are very important to today's electronics. Your iPod, laptop, and television use them. They make electronics light so they don't need much power. But the Chinese have a lock on the production of rare earth elements and this could become a problem for the US.

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Coaltrain
Science

Clearing Carbon From Our Air

Carbon can be found in just about everything on earth, including proteins, DNA, and fats. Scientists around the world are working together to measure carbon dioxide in our atmosphere and oceans. This public radio story introduces us to a scientist who is passionate about the global climate crisis. The story challenges students’ math skills and gets them thinking about their carbon footprint.

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Science

Clinical Trials Don’t Reflect the Diversity of America

American doctors rely on clinical trials to determine which drugs to use in treatment. Researchers have found that clinical trials have not been effective in creating drugs for America’s diverse population. When clinical trials are too homogeneous, they can leave important discoveries undiscovered. Patients who are diverse ethnically and racially can respond differently to medications, leading to dire consequences. Listen to learn how a lack of diversity in clinical trials affects patients and how researchers are trying to fix it.

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Cloud seeding
Science

Cloud Seeding for Weather Modification

As more U.S. states and countries experience drought, scientists are looking at ways to help the clouds produce rain. It's called cloud seeding or weather modification and it's not proven to work. This public radio story looks at the scientific process and the controversy over cloud seeding.

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Cooking up a super volcano
Science

Cooking Up a Supervolcano

Giant volcano eruptions are rare, but they are deadly. So scientists are studying two new suspected volcanic “hot spots.” By using seismic waves, a picture has emerged of large regions where intense volcanic activity could emerge in the distant future. This audio story looks at volcanic hot spots and supervolcanoes.

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Corals and climate change
Science

Corals and Climate Change

What makes up a coral? This audio story takes you to an underwater observatory where a scientist is studying coral reefs. The scientist has found that CO2 in the ocean is making the ocean warmer and dissolving the coral reef system. But the scientist also discusses how coral reefs can recover. Listen to this story to hear the factors that threaten coral reefs and how they can recover.

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Design inspiration from nature
Science

Design Inspiration from Nature Makes Oyster Glue

What can nature teach us? A lot. Biomimicry is the design and production of materials based on nature. In this public radio story you learn about how shellfish can stick so stubbornly to rocks underwater. You also hear from a scientist who has devoted his life to trying to figure out the secret of why oyster glue is so strong.

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Losing linnaeus
Science

DNA Changes the Linnaean Classification System

The naming of every living thing has it's place because of a Swedish biologist. This public radio story is about the system we use to organize life called Linnean system, named after Swedish botanist Carl Linnaeus. But now new DNA technology is changing the way to think about the classification system.

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Earthquake damages hydropower systems
Science

Earthquake Damages Hydropower Systems

Earthquakes can have far-reaching consequences not just on homes but on the power infrastructure. A 2008 earthquake in Southwest China left officials and engineers monitoring the structural integrity of enormous hydroelectric dams built to generate power. A fear of flooding caused by a cracked damn led some to wonder if they had taken the strengths of the region, its rivers and irrigation systems, and turned them into a potential threat. Listen to learn how hydroelectric power systems impact places and people.

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Ebola a complex problem
Science

Ebola: A Complex Virus to Cure

The Ebola outbreak in West Africa has inspired widespread fear throughout the U.S. and in many other countries. In reality, the threat of Ebola is actually quite small with only 1,700 deaths since 1976. The rarity of the Ebola virus has given major pharmaceutical companies very little incentive to develop a treatment for the virus given that the market for such a drug would be almost nonexistent. However, BioCryst Pharmaceuticals, a small pharmaceutical company based in Frederick, MD, has been given government help to develop a cure for the virus. Listen to learn more about the complexity of the Ebola virus and what is being done to develop a cure.

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Science

Editing Human Genes

We live in an age when genetic engineering has the capacity to affect the course of human evolution. Scientists can edit human DNA, which could have profound benefits for society, but they also come with dangers. Editing human DNA can allow for the treatment and prevention of disease, but edited DNA can also be passed down from generation to generation, becoming a permanent part of human genes. The scientific community met to discuss these issues and clearly stated that creating a baby with edited DNA is dangerous and unsafe, but supported the basic research to see what is possible before taking any next steps. Listen to hear more about this issue and what scientists have concluded.

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Electricity and eels
Science

Eels Protect from Predators with Electric Volts

Animals adapt to their environment in ways that protect them from predation and allow them to find prey. Electric eels look like water snakes but use electricity to hunt. New scientific studies have gained insight into how electric eels use different electric volts to find and kill their prey. Listen to learn how the eel’s hunting method is adapted to their environment.

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Engineering with mushrooms
Science

Engineering Design Turns Mushrooms into Foam

In this story we hear from the head of Ecovative, a company that uses mycelium fibers from fungi to create useful and environmentally-friendly products. The audio story discusses the advantages of using mycelium fibers in place of plastics and foams, as well as the challenges faced by the inventors in trying to create useful products. The Engineering design process is described, as well as how scientists used this process to get to where they are today. Students will get to explore the properties of Ecovative’s products, and evaluate their usefulness. Listen to this story and think about the idea of technological trade-offs.

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Science

Extreme Heat

Our bodies react differently to extreme heat depending on how much humidity is in the air. Heat index is a measure of how hot it feels outside, taking into account both air temperature and relative humidity. As the humidity rises, the heat index rises. In dry heat, our sweat quickly evaporates, which helps lower our internal temperature; but on a humid day, our sweat cannot fully evaporate as the air is already damp, and this prevents us from effectively cooling off. It also raises our risk of heat stroke and even death. To illustrate the science, this podcast considers the case of a man who was lost for three weeks in a remote desert in southern Utah and survived. Listen to hear more about dry versus wet heat and how it affects the human body.

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Extreme rains and global warming
Science

Extreme Rains and Global Warming

Scientists are using computer computations to link cases of extreme weather to global warming. Scientists set out to link major flooding in England and Wales in the fall of 2000 to climate change. This task was undertaken by scientists and citizens alike - running thousands of computer simulations and comparing the result in a world with climate change and one without it. Listen to learn what these simulations found.

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Fish to land
Science

Fish Fossil Gives Clues to Evolution

Animal species evolve and adapt over time. This ability to change lays the groundwork for human evolution. Over 375 million years ago an important transition in this lineage occurred - animals living in the sea, began living on land. This complex process happened gradually over generations and an unusual fish fossil found in the Canadian Arctic may help enhance our understanding of this progression.

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Fish sounds
Science

Fish Sounds Indicate Behavior

Marine biologists are studying the sounds that fish make. They believe that sounds are key to understanding fish behavior. This audio story explores how listening to fish may also be a way to help protect them. By studying the sounds that fish make when trying to attract mates and when breeding, biologists may be able to stay clear of them during those times to help them reproduce more productively.

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Fungi
Science

Fungi Sustains Ecosystems

Fungi play a crucial role in decomposition. This audio story emphasizes the destructive power of molds, as well as their vital importance in sustaining ecosystems. You'll be transported to a forest to learn how and why fungi is all around us.

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Engineering a cooler climate
Science

Geoengineering Combats Global Warming

Scientists say it’s nearly certain that human activity and fossil fuels are warming the planet. The mainstream discussion focuses on alternative energy and reducing fossil fuel emissions. But the field of geoengineering is looking for more large scale and proactive things we can do to offset warming. Some see this as an exciting way to help the planet, others as a threat. Listen to learn about the strategies geoengineers are exploring to prevent further global warming.

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Geology through sound
Science

Geological Data about Climate Change Turns into Music Through Sound

What does climate change sound like? You will hear in this public radio story about a geologist who has turned decades worth of data into music. He created a multitrack sequencer for data instead of music. The data and music shows a tight correlation between the amount of carbon dioxide and the amount of ice on the earth.

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Giant squid eyes
Science

Giant Squid Eyes

Scientists have wondered why giant squid and colossal squid have such enormous eyes. Their eyes are the size of basketballs. Their thinking about this question has been hampered by the rarity of these animals and the difficulty of preserving eye specimens. Using some clever techniques and luck, researchers have been able to measure the size of giant squid eyes. This has led to an interesting hypothesis about why their eyes are so enormous.

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Gravity and the curveball
Science

Gravity and the Curveball

Throwing a curveball is one of the most difficult pitches in baseball. In this public radio story an expert in throwing the curve ball gives you a tutorial, but it’s also a lesson in physics and gravity as we look at how objects travel through space.

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Beyond our solar system
Science

Gravity Helps Detect a New Planet in Neighboring Solar System

Gravity keeps our feet on the ground, it creates a curve ball, and it can also be used to find new planets. The star at the center of our solar system maintains life on Earth and its gravitational pull creates the orbit of planets. But our sun is just one of many stars in an ever expanding universe. Alpha Centauri is the closest star system to our solar system and new technology is allowing us to better understand our neighbor. Observations of Alpha Centauri date back to 1592, but it wasn’t until 2012 that astronomers in Chile were able to identify a planet orbiting one of the stars in Alpha Centauri because of its gravitational wobble. Listen to learn more about the properties and potential of this new planet.

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Fighting gravity
Science

Gravity's Strong Pull is Actually a Weak Force

Gravity keeps the earth, moon and sun in orbit. It keeps us on the ground instead of floating in space. And yet, it is the weakest of all the forces. This public radio story explores the velocity in rockets, the shapes of planets, the trajectories of baseballs, and even the strength of the human leg bones.

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