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    Natural Sciences

    KGNU – How On Earth

    The KGNU Science Show

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    Latest Episodes:
    Silent Sky // Gold Lab Symposium May 12, 2026
    Show notes

    Protest It, Respect It, Defend It, Use It (starts 1:00) Friday at Denver Patagonia and Saturday at Boulder Patagonia environmental activists Annie Leonard and André Carothers discuss their new book

    Silent Sky (starts 2:00) Viva Theater celebrates the unsung heroism of female astronomer Henrietta Leavitt. Silent Sky runs April 22 – June 7th at Boulder’s Dairy Arts Center

    Gold Lab Symposium (starts 6:26) Thursday and Friday, this all day health and science symposium shares dialogues with Nobel Prize Winners, Indigenous Knowledge Holders, Computational Scientists and more, at CU-Boulder’s Jennie Smoly Caruthers Biotechnology Building Register On Line. for live sessions or remote.

    Executive Producer: Susan Moran
    Show Producer: Shelley Schlender
    Engineer: Abby O’Brien

    A Longer Healthier Life May 05, 2026
    Show notes

    On this week’s How on Earth, Beth speaks with author, psychologist, and aging explorer Alan Carpenter to discuss the paradigm shift on aging he espouses. Following a life changing accident, he turned his life around by diving into the science of healthy aging. In his book, Choose Better, Live Better, he outlines 9 avenues one can address for extending health span i.e. the portion of one’s life spent in good health with the ability to live and function independently.

    Executive Producer: Susan Moran
    Show Producer: Beth Bennett
    Additional Contribution: Shelley Schlender
    Engineer: Abby O’Brien

    Listen to the show:

    The Loneliness Epidemic – CSU Researcher Natalie Pennington Apr 27, 2026
    Show notes
    Friendship Researcher Natalie Pennington

    The Loneliness Epidemic – Social media fuels extra risk. Especially vulnerable are people undergoing transitions . . . such as college students, who today share what can lead loneliness and how to heal from it. CU-Boulder senior Lorraine Healey also talks with Colorado State University “Friendship Researcher” Natalie Pennington about why times of transition can trigger loneliness but also be important times for growth.

    Hosts: Mac Hebebrand, Benita Lee and Lorraine Healey
    Show Producers: Lorraine Healey and Shelley Schlender
    Executive Producer: Susan Moran

    Additional Music by Lynn Patrick

    Forest as Superorganism: What it means to Clearcut. Apr 21, 2026
    Show notes

    On this week’s How on Earth, Beth speaks with Suzanne Simard, professor and researcher at the University of British Columbia, about her book, WHEN THE FOREST BREATHES, both a call to action, and a journey into the heart of British Columbia’s old growth forests and the indigenous communities that live there, and her efforts to unite them to ensure the health of these vital ecosystems.Also: an allergist’s take on why this year’s seasonal allergies are worse than normal.

    Executive Producer: Susan Moran
    Show Producer: Beth Bennett

    Listen to the show:

    Buy Now Pay Later – Enticement or Addiction? Apr 14, 2026
    Show notes

    Buy Now Pay Later – is this lending service simply enticing, or is it addictive? For the GenZ 20 somethings that are its biggest users, is Buy Now Pay Later a danger or a deal? CU Boulder student and Howonearth volunteer Juliana Krigsman speaks with students about this, plus Adam Brown – director of New Schools Center for Global Mental Health, Renee Shannon Hickey – Mindful Creation Counseling in Colorado, and Harvard Business Economics Researcher Justin Katz.

    Hosts: Joel Parker
    Show Producers: Juliana Krigsman and Shelley Schlender
    Executive Producer: Susan Moran

    Women’s Health Pt. III: Menopause & the Brain Apr 07, 2026
    Show notes
    Estrogen on the brain
    Credit: Mosconi Lab

    The Brain on Menopause (start time: 01:24) In this week’s show, we offer the finale of our three-part series on menopause and women’s health. We focus on a most precious organ: the brain. And we discuss how hormones such as estrogen and cortisol affect brain health; on how experiencing stress during childhood can intensify perimenopause symptoms; and on what women can do to reduce risks as well as to take part in research. How On Earth’s Susan Moran and contributing host Meghan Rabbitt interview Dr. Christina Metcalf, a clinical psychologist and researcher at the CU Anschutz Department of Psychiatry Colorado Center for Women’s Behavioral Health and Wellness. Journalist Meghan Rabbitt wrote the recently published book The New Rules of Women’s Health: A Guide to Thriving at Every Age.
    Information on how you can participate in CU Anschutz research studies:
    * “Find a Research Study” tool lets people filter by category, 3 menopause-related studies currently recruiting.
    *RAHH Lab (Resilience and Adaptation in Hormones and Health Lab)
    -New menopause research study focusing on estradiol and the brain, called CEREBRA, starting in April 2026. Email cerebra-study@cuanschutz.edu.
    – Menopause stress reduction study (MENORISE, starting in September 2026. Email christina.metcalf@cuanschutz.edu.

    Hosts: Susan Moran, Meghan Rabbitt
    Show Producer: Susan Moran
    Engineer: Joel Parker
    Executive Producer: Susan Moran
    Listen to the show here:

    A Brain Circuit That Switches Acute to Chronic Pain Mar 31, 2026
    Show notes

    On this week’s How on Earth, Beth talks with neuroscientist and chronic pain researcher Jayson Ball. He recently completed a study of a novel brain circuit involved in generating chronic pain. Since finishing his graduate studies at CU Boulder, he has moved to Neuralink, a biotech start up focused on implantable brain devices with the goal of someday alleviating chronic pain through this new technology.

    Executive Producer: Beth Bennett
    Show Producer: Beth Bennett
    Additional Contributions: Shelley Schlender and Abby O’Brien
    Engineer: Abby O’Brien

    Listen to the show:

    Conserving Imperiled Prairie Dogs, Raptors & Their Grasslands Mar 24, 2026
    Show notes
    White-tailed Prairie Dogs Credit: Rich Reading

    Preserving prairie dog+raptor ecosystem (start time: 5:03) Spring has just begun, even if winter hardly visited Colorado. On the plains, prairie dog colonies seem to be in full swing. However, populations of these keystone species have plummeted, as the grasslands they and raptor predators rely on are being fragmented by urban development, as well as oil and gas, and to some degree solar and wind, development. In this week’s show we discuss the imperiled prairie ecosystem and efforts to further conserve them, with Dr. Rich Reading, vice president of science and conservation at the Butterfly Pavilion; and Dana Bove, founder of the nonprofit Front Range Nesting Bald Eagle Studies. Click here for information about and to register for their and colleagues’ upcoming Science and Conservation Symposium (March 31 and April 14) in Denver.

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

    Listen to the show here:

    Pollinator Power & Precarity Mar 17, 2026
    Show notes
    Photo credit: Butterfly Pavilion

    The Power of Precarity of Pollinators (start time: 8:01) This extremely warm winter in Colorado has delivered early spring blooms, and thus early appearances of some pollinators. In this week’s show we explore the world of pollinators, such as such as butterflies, bees, moths, hummingbirds and certain flies. Pollinators are responsible for roughly one third of the food we eat, and the help strengthen ecosystems. How On Earth host Susan Moran interviews Amy Yarger, senior director of Horticulture at the Butterfly Pavilion in Westminster, Colo., about the critical role these pollinators play; the various threats they face, such as the herbicide glyphosate (Roundup) and the class of insecticides called neonicotinoids; and how we can help give these important creatures a lift. Yarger leads local pollinator habitat initiatives at the Butterfly Pavilion, a nonprofit research, conservation and education institution focusing on invertebrates and their habitats.

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

    Listen to the show here:

    The Scale of the Universe Mar 03, 2026
    Show notes

    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 Earth and how can we understand and measure such vast expanses? In this episode, our guest, astronomer and author Dr. Jeff Bennett, helps us wrap our minds around these ideas as we discuss his book The Scale of the Universe. We look back at the Big Bang, the possibility of the existence and meeting aliens, and when events such as the formation of our solar system, the appearance and demise of the dinosaurs, and the evolution of humans fit into the “Cosmic Calendar”.

    Host: Joel Parker
    Show Producer/Engineer: Joel Parker
    Executive Producer: Beth Bennett

    Listen to the show:

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