KGNU - How On Earth
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KGNU - How On Earth
The KGNU Science Show
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Pollinator Power & Precarity
The Power of Precarity of Pollinators (start time: 8:01) This extremely warm winter in Colorado has delivered early spring blooms, and thus early appe...
The Scale of the Universe
How big is the universe – not just in the scale of distance but also the scale of time? What do those…astronomical…scales mean about us humans on Ea...
Winter Recreation in a Warmer World
On this week’s How on Earth, we hear from a climate scientist about the implications of our changing weather patterns for winter recreation. It’s a wa...
What do Grasslands Have to do with Climate Change?
We hear an interview aired by our sister community radio station’s, Science MOAB. Ecologist Brooke Osborne talks about how dryland ecosystems – such a...
Women’s Health Pt. II: Heart Health
Truths & Tips About Women’s Heart Health (start time: 7:33) February is American Hearth Month, a nationwide observation spotlighting cardiovascular...
Women’s Health Pt. I: Menopause, etc.
New Rules of Women’s Health (start time: 6:26) If you’re female, you may have come of age reading the landmark feminist health book Our Bodies, Oursel...
Hepatitis B Vaccination: Just the Facts
On today’s science show we hear from vaccine researchers Rochelle Walensky and Angela Ulrich, and physician/scientist Peyton Thompson, about the safet...
Water Your Winter Trees
Water your trees! This warm, dry winter means urban trees need extra water to stay healthy. City of Boulder foresters Patrick LaPhilliph and Andrew...
Improving Law Enforcement Behavior through Artificial Intelligence
We speak with experts about how artificial intelligence combined with Police Body Camera footage improved professionalism in the Aurora Colorado Polic...
Colorado’s Wildlife Action Plan, etc.: Pt. II
Protecting Wolves, ferrets, prairie dogs, vultures, etc. (start time: 3:39) How effective are Colorado’s efforts to preserve vulnerable species – wolv...
Colorado’s Wildlife Action plan: Pt. I
Wolves, bears, prairie dogs and more (start time: 7:12) A couple of months ago, the Colorado Parks and Wildlife agency released a plan to support biod...
Coral: Past, Present, Future
In this week’s show Beth speaks with science writer, educator, and scientist Dr. Lisa Gardiner about her recent book Reefs of Time: What Fossils Revea...
Wind: It’s Past & Future
The Force of Wind (start time: 7:10) For those living here on Colorado’s Front Range, you’ve likely had close encounters with wind — whether you’ve w...
World Domination…by Slime Molds?
On today’s show, Beth speaks with award-winning science writer Jennifer Frazer about her upcoming book: The Slime Mold’s Guide to World Domination: A...
Critical Earth Minerals Hiding in Plain Sight – Elizabeth Holley
Critical Earth Minerals Hiding in Plain Site – Colorado School of Mines professor Elizabeth Holley shares how the US could break its dependency on c...
Better Steam//CU-Boulder at World Climate Conference
Great Steam . . . from a Heat Pump (starts 1:00) Time Magazine named CSU Engineer Todd Bandhauer one of 2025’s top climate innovators. His heat pum...
Megadroughts Could Cause World Wide Dustbowls — CSU Melinda Smith Explains
Dustbowl Days Today (starts 5:00) Colorado State University grasslands scientist Melinda Smith explains the study she conducted with the grassroots h...
Winter is Coming: Why Leaves Fall
The physiology of deciduous trees (start time: 11:09) For many people living in places with four distinct seasons, such as here in Colorado, a favorit...
Peak Performance: Revisiting a Classic
Five years ago, Beth spoke with Dr Marc Bubbs about his best-selling hardcover book, PEAK: THE NEW SCIENCE OF ATHLETIC PERFORMANCE. Since then, Bubbs...
Into The Unknown (Part 2)
Into The Unknown (starts at 9:05) 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 d...
Into The Unknown (Part 1)
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 d...
Autumn Insects and their Songs
Science & Songs of Katydids, Cicadas, etc. (start time: 3:08) It’s the time of year to savor listening each night to the pulsating and clicking sound...
From Habitat Loss to Repairing Connectivity
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, ...
Science Journalism with Miles O’Brien // Acetaminophen and Autism
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...
What About All Those Body Products We Buy?
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...
Menopause, Hormone Therapy, Science
Menopause & HT (start time: 0:58) It happens to every woman with a uterus who reaches midlife. Menopause is a major hormonal transition that, althou...
The (ever-changing) Scoop on Vaccines
On this week’s How on Earth, Beth describes recent developments in defunding NIH research and CDC limits on vaccine availability; then digs into vacci...
Climate Change, Astronomy, Canine Astronauts
Climate change. Astronomy. A canine astronaut. They intersect in our guest, astronomer and author Dr. Jeff Bennett. Among other things, we focus on c...
Bill McKibben – Here Comes the Sun
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 eno...
Wildfires in a Changing Climate
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...
Climate Science, Human Lives at Risk
Standing Up for Science (start time: 6:39) Since President Trump began his second term in January, his administration has been on a rapid-fire campai...
The Vera Rubin Observatory
The history of astronomy has many stories of trying to understand our universe, and those stories are connected by a common thread: looking at the sky...
50 Years of Open Space! // Heart Attack and Stroke Risk from Common Sugar Substitute
A Common Sugar Substitute Increases Risk of Heart Attack and Stroke. (starts 11:00) CU-Boulder Integrative Physiologist Chris DeSouza explains his r...
The Tumor Microbiome Can Affect Cancer Survival
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 inv...
Climate Science, Cutbacks, Litigation
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 ad...
How We Grow Up: Understanding Adolescence by Matt Richtel
Teens are in Crisis – Some people warn that Cell Phones are to blame. But Colorado Native and Pulitzer prize winner Matt Richtel says our tech can be...
Bird Conservancy of the Rockies – Eric DeFonso
Merlin Bird ID App (starts 1:00) Boulder Naturalists Steve Jones and Ruth Carol Cushman explore the benefits of the Merlin smartphone app, along with...
Viruses are Us!
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 f...
2025 Graduation Special (part 2)
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 scien...
GLP-1 and Blindness
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 associa...