PODCAST

How On Earth

The KGNU Science Show

science natural sciences

All Episodes

26:53

Into The Unknown (Part 1)

How On Earth ·

2025/10/21

Into The Unknown (starts at 7:57) What do we know about the universe, and how do we know we know it? Conversely, what do we know we don’t know, what don’t we know that we don’t know, and why not? To help us unravel these age-old philosophical questions in the context of current science, our … Continue reading "Into The Unknown (Part 1)"

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27:30

From Habitat Loss to Repairing Connectivity

How On Earth ·

2025/10/07

Helping Wild Animals Roam (start time: 3:29) Wild animals, whether buffalos or bats, need space to move around–not just to survive, but to forage, reproduce, migrate, and generally thrive as a species. But it’s getting increasingly difficult for so many species to do this, thanks to humans breaking up their habitats to build roads, fences, … Continue reading "From Habitat Loss to Repairing Connectivity"

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27:00

Science Journalism with Miles O’Brien //...

How On Earth ·

2025/09/30

This episode features Miles O’Brien, a science journalist who has been a correspondent for PBS News and CNN. He talks about his experience breaking in to science journalism, past and current science reporting, public and political views of science, the value of scientific research, and some particular stories including beavers, prostheses, and climate change research in … Continue reading "Science Journalism with Miles O’Brien // Acetaminophen and Autism"

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27:57

What About All Those Body Products We Buy?

How On Earth ·

2025/09/23

On this week’s How On Earth, Beth spoke with two cosmetic chemists, hosts of the podcast The Beauty Brains. We touched on some basic questions I have regarding some of the universe of products, such as shampoos, body lotions and sun screens. Beauty Brains Perry Romanowski and Valerie George, are both veteran cosmetic product developers … Continue reading "What About All Those Body Products We Buy?"

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26:58

Bill McKibben – Here Comes the Sun

How On Earth ·

2025/08/26

US Critical Earth Metals “Hiding in Plain Sight” (starts 1:00) Colorado School of Mines has just published a new study that indicates the US has enough critical earth metals to stop importing them from other countries . . . if we develop the capacity. Bill McKibben – Here Comes the Sun: A Last Chance for … Continue reading "Bill McKibben – Here Comes the Sun"

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26:40

Wildfires in a Changing Climate

How On Earth ·

2025/08/19

On this week’s show we replay an interview from two years ago with author John Valliant on his then-newly released book, Fire Weather, the story – and much more- of the groundbreaking wildfire that devastated the oil sands capital city of Fort McMurray in Alberta. Given the current outbreaks of Colorado wildfires, getting bigger and … Continue reading "Wildfires in a Changing Climate"

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26:38

The Tumor Microbiome Can Affect Cancer Survival

How On Earth ·

2025/07/22

On this week’s show Beth speaks with computational biologist Justine Debelius about the role of the microbiome. We first discussed a study she was involved in recently that identified how changes in colon cancer tumors can affect survival. Then, she described a large collaborative project she is currently working on to identify factors influencing the … Continue reading "The Tumor Microbiome Can Affect Cancer Survival"

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26:06

Climate Science, Cutbacks, Litigation

How On Earth ·

2025/07/15

Tackling Climate Change and Science Cutbacks (start time: 7:03) In this week’s show we discuss the ongoing barrage of executive orders by the Trump administration; and the impacts of defunding of federal agencies, scientific research and scientists focusing on climate change and the environment. We also explore how the legal and political landscape, including pushback … Continue reading "Climate Science, Cutbacks, Litigation"

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27:17

Viruses are Us!

How On Earth ·

2025/06/24

In this week’s science show Beth talks with genome biologist Ed Chuong of CU Boulder’s innovation incubator, the Biofrontiers Institute. Ed takes us for a whirlwind tour of the evolutionary history of these viral invaders of our genome, and some examples of how they can simultaneously be friend and foe. Teaser, did you realize that … Continue reading "Viruses are Us!"

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27:24

2025 Graduation Special (part 2)

How On Earth ·

2025/06/17

With graduation season upon us, today’s edition of How on Earth is Part 2 of our annual “Graduation Special”. Our guests in the studio today are scientists and engineers who recently received their Ph.D. from the University of Colorado in a STEM-related field. They talk about their thesis research, their grad school experiences, and what … Continue reading "2025 Graduation Special (part 2)"

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26:58

GLP-1 and Blindness

How On Earth ·

2025/06/10

We talk with scientists who report that a common weight loss/diabetes drug known as a GLP-1 receptor agonist (Wegovy, Ozempic for instance) is associated with an increased risk of blindness. The study was published last week in the Journal of the American Medical Association Ophthalmology, about a form of blindness known as “wet” macular degeneration. … Continue reading "GLP-1 and Blindness"

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28:11

Animal Pandemics?

How On Earth ·

2025/06/03

On this week’s How on Earth, Beth talks with author and science journalist Liz Kalaugher, about her new book, The Elephant in the room:How to Stop Making Ourselves and Other Animals Sick. Think about it this way: When new diseases spread, news reports often focus on wildlife culprits–rodents, monkeys and mpox; bats and COVID-19; waterfowl … Continue reading "Animal Pandemics?"

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27:01

Saving Weather Forecasting, Climate Science

How On Earth ·

2025/05/27

Scientists speak out for science (start time: 1:00) The Trump administration has been on a dizzying streak of slashing federal funding for scientific research, and firing thousands of federal scientists. Among the casualties is the National Weather Service, which supplies critical data from air balloons and climate models to develop weather forecasts. Many cities and … Continue reading "Saving Weather Forecasting, Climate Science"

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Gold Lab Symposium – Cardiologist Nelson Trujillo

How On Earth ·

2025/05/13

Larry Gold speaks about the GoldLab Foundation’s 2025 Symposium. Cardiologist Nelson Trujillo (Starts 2:55) Nelson Trujillo will speak at the Symposium about the existential crisis doctors face today, and solutions. The GoldLab Foundation Symposium takes place Thursday and Friday, May 15 and 16, at CU Boulder’s Muenzinger Auditorium. Sessions start at 9 AM. HOTLINKS: Biochemist … Continue reading "Gold Lab Symposium – Cardiologist Nelson Trujillo"

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56:21

Boulder Cardiologist Nelson Trujillo – Extended Version

How On Earth ·

2025/05/12

This is an extended version of our interview with Boulder Cardiologist Nelson Trujillo. For the broadcast version, go here. Producer: Shelley Schlender

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44:56

GoldLab Founder Larry Gold – Extended Interview

How On Earth ·

2025/05/12

This is Shelley Schlender’s extended interview of Larry Gold, founder of the GoldLab Symposium. For the broadcast version, go here. Producer: Shelley Schlender

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De-funding Science: NIST’s Atomic Spectroscopy Group...

How On Earth ·

2025/04/22

DE-FUNDING SCIENCE National Institute of Standards Atomic Spectroscopy Group TRANSCRIPT of KGNU Science Show April 22, 2025 Shelley Schlender [00:00:13] I’m Shelley Schlender. This is How on Earth, the KGNU Science Show. Today is Tuesday, April 22nd, 2025. Coming up, we look at federal cutbacks of a group that provides the entire world with accuracy … Continue reading "De-funding Science: NIST’s Atomic Spectroscopy Group TRANSCRIPT"

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26:58

The Lucy Mission

How On Earth ·

2025/04/15

Our guest today is Dr. Simone Marchi, Institute Scientist in the Solar System Science & Exploration Division at the Boulder office of Southwest Research Institute. Dr. Marchi is the Deputy Principal Investigator for NASA’s Lucy mission. Lucy will be the first space mission to explore a population of small bodies known as the Trojan asteroids, … Continue reading "The Lucy Mission"

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25:38

NEPA, Wildlife, Lands Under Threat

How On Earth ·

2025/03/25

NEPA rollbacks, environmental impacts (start time: 6:25) Amidst a flurry of moves by the Trump administration to roll back environmental regulations, last month a White House agency proposed a rule to rescind a landmark law meant to protect wildlife, their habitat, and human communities from unchecked development, and to ensure that the public has a say … Continue reading "NEPA, Wildlife, Lands Under Threat"

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27:25

Measles: To Vaccinate or Not?

How On Earth ·

2025/03/17

On this week’s show, Beth talks with Brianne Barker, Associate Professor of Biology and Director of Undergraduate Research at Drew University. Dr Barker studies innate immune responses – these are the initial, non-specific actions taken by the immune system – to fight off retroviruses such as HIV (the AIDS virus). We discuss the measles virus, … Continue reading "Measles: To Vaccinate or Not?"

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