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KGNU – How On Earth — Natural Sciences
KGNU – How On Earth

The KGNU Science Show

Latest Episodes:

Birds at Risk May 20, 2025
Show notes

Arvind Panjabi releasing a banded grasshopper sparrow in Chihuahua state, Mexico. Photo credit: Sujata Gupta

Birds: Risk and Resilience (start time: 5:55) What speaks of Spring more than the songs of American robins, yellow warblers, spotted towhees and other birds in the early morning? As we relish in these avians choruses, it’s also an important time to examine why bird populations in North America have, by and large, been plummeting in recent decades, due to multiple stressors, including climate change and habitat destruction. At the same time, some conservation efforts (including bipartisan legislation) on the federal, state and local levels, are bearing some fruit. And everyone can help give these winged creatures a hand, starting with their own gardens, and by getting involved in citizen science projects, such a bird-banding and bird-counting. In this week’s show, host Susan Moran interviews Arvind Panjabi, a senior research scientist at Bird Conservancy of the Rockies, a nonprofit organization devoted to the conservation of birds and their habitats. (Listen to Shelley Schlender’s sound portrait of five migratory birds that are visiting Colorado now (start time: 2:58).

Host/Producer: Susan Moran
Engineer: Jackie Sedley
Executive Producer: Joel Parker
Headline Contributors: Joel Parker, Shelley Schlender

Listen to the show here:

Boulder Cardiologist Nelson Trujillo – Extended Version May 12, 2025
Show notes

Nelson Trujillo – Boulder Heart

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

Producer: Shelley Schlender

GoldLab Founder Larry Gold – Extended Interview May 12, 2025
Show notes

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

Producer: Shelley Schlender

Larry Gold

diploma-and-graduation-hat — 2025 Graduation Special (part 1) May 06, 2025
Show notes

With graduation season upon us, today’s edition of How on Earth is Part 1 of our annual “Graduation Special”. Our guests in the studio today are scientists and engineers who have or will soon receive their Masters or Ph.D. from the University of Colorado in a STEM-related field. They talk about their thesis research, their grad school experiences, and what they have planned next.

Renee Spear – Aerospace Engineering
Topic: Collision-Free Spacecraft Trajectory Design in Multi-Body Systems

Gautam Kavuri – Physics
Topic: Wringing the Bell: Implementations of Cryptographic Protocols Based on Bell Non-locality

Dhyey Bhavsar – Aerospace Engineering
Topic: Shape Diameter Computation on Surface Meshes and A Review of Shape Regularization Methods in Level-Set Topology Optimization

You can listen to all past year Graduation Special episodes.

Host / Producer: Joel Parker

Listen to the show:

2025 Graduation Special (part 1) May 06, 2025
Show notes

With graduation season upon us, today’s edition of How on Earth is Part 1 of our annual “Graduation Special”. Our guests in the studio today are scientists and engineers who have or will soon receive their Masters or Ph.D. from the University of Colorado in a STEM-related field. They talk about their thesis research, their grad school experiences, and what they have planned next.

Renee Spear – Aerospace Engineering
Topic: Collision-Free Spacecraft Trajectory Design in Multi-Body Systems

Gautam Kavuri – Physics
Topic: Wringing the Bell: Implementations of Cryptographic Protocols Based on Bell Non-locality

Dhyey Bhavsar – Aerospace Engineering
Topic: Shape Diameter Computation on Surface Meshes and A Review of Shape Regularization Methods in Level-Set Topology Optimization

You can listen to all past year Graduation Special episodes.

Host / Producer: Joel Parker

Listen to the show:

Mutualism in Nature Apr 29, 2025
Show notes

Sweet in Tooth and Claw (start time: 0:59) Since the 1800s, science has been obsessed with the notion, stemming from Charles Darwin’s theory of evolution through natural selection, that only the “fittest” can survive and pass on their strong genes. As in, it’s a ruthless, violent world. And today, we humans find ourselves mired in a hyper-polarized society fixated on competition, disruption, and “If you win, I lose” thinking. A good time to take a look at a different way of living together–how a “kinder, gentler” approach also helps species evolve. In this week’s show, Susan Moran interviews journalist/author Kristin Ohlson, whose most recent book, Sweet in Tooth and Claw: Stories of Generosity and Cooperation in the Natural World, was recently released in paperback by Patagonia Works.

Host/Producer: Susan Moran
Engineer: Jackie Sedley
Executive Producer: Joel Parker

Listen to the show here:

De-funding NIST’s Atomic Spectroscopy Group Apr 22, 2025
Show notes

Alexander Kramida – NIST Atomic Spectroscopy Group – phote from NIST

Federal cutbacks have led the National Institute of Standards and Technology to shut down a long-running, highly prized information center used by scientists around the world, for projects ranging from searching for exoplanets, to making better microchips, to detecting atomic missiles. Atomic Spectroscopy Database Manager Alexander Kramida explains the purpose of the Atomic Spectroscopy Group, the impact of losing it, and what’s next, now that federal budget cuts mean NIST is shutting it down.

For a Transcript, go here.

Host & Show Producer: Shelley Schlender
Additional Contributions: Joel Parker
Executive Producer: Joel Parker

The Lucy Mission Apr 15, 2025
Show notes

image credit: NASA

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, which orbit out at the distance of Jupiter. Lucy has two “practice” flybys of main belt asteroids: Dinkinesh in November 2023, and Donaldjohanson coming up in just a few days on April 20, 2025.

Producer and Host: Joel Parker

Listen to the show:

Poisoning the Well: How Forever Chemicals Contaminated America. Apr 08, 2025
Show notes

Poisoning the Well (starts 2:00) Boulder science writer Sharon Udasin discusses her new book, Poisoning the Well: How Forever Chemicals Contaminated America. The book chronicles how these chemicals have ended up in our soil , drinking water, our bloodstreams . . . including in Colorado. She also explains what we can do about these sometimes useful, but far too often, health-endangering chemicals.

Sharon will speak April 8th at the Boulder Bookstore.

Other events discussed in this show are the CU-Boulder Conference on World Affairs and the Dinosaur Ridge Raptorthon

Special thanks to Simon Roberts and his youtube channel, Environmental Chemistry Explained, for the song, “Forever Chemicals.”

Producer and Host: Shelley Schlender
Executive Producer: Joel Parker

Listen to the show:

April Foolish Science Apr 01, 2025
Show notes

Today is April Fools’ day, when jokes and pranks are played, sometimes among friends and family, sometimes on a more public scale. But why is there such a day for culturally-accepted foolishness? To delve into the origins and history of April Fools’ Day, we talk with Dr. Angus Kress Gillespie, folklorist and professor of American studies at Rutgers University.

(Image credit: Zurijeta | Shutterstock.com)

You might find it shocking that scientists have a sense of humor, so we also talk with, Dr. Mike Lund from the NASA Exoplanet Science Institute at the Infrared Processing & Analysis Center / CalTech about the tradition among Astronomers to write and even review humorous research papers for April Fools’ day. These papers are often posted on the arXiv preprint server, and Dr. Lund, the author of several such papers, also is the editor of the Acta Prima Aprilia that shares some of those papers.

Producer and Host: Joel Parker
Additional contributions: Beth Bennett
Executive Producer: Joel Parker

Listen to the show here:

NEPA, Wildlife, Lands Under Threat Mar 25, 2025
Show notes

oil and gas rig Image courtesy of USGS

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 in projects ranging from oil and gas drilling to wind and solar farms. The rule, if it goes into effect, would mean that the White House Council on Environmental Quality would no longer enforce how the National Environmental Policy Act (NEPA) is carried out. As a result, many infrastructure projects would not be subject to environmental review. A public comment period regarding this proposed rule ends on Friday, March 27. (Click here to submit any comments.) How On Earth host Susan Moran interviews Jim McElfish, a senior advisor at the Environmental Law Institute, a nonpartisan, nonprofit center working to strengthening environmental protection by improving law and governance.

Hosts: Susan Moran, Joel Parker
Show Producer: Susan Moran
Engineer: Joel Parker
Headline contributors: Beth Bennett, Joel Parker
Executive Producer: Beth Bennett

Listen to the show here:

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