Oceanography

How many species are there in the ocean? Marine biologist and taxonomist Manuel Caballero Gutierrez joins Oceanography to explore one of the biggest unanswered questions in marine science: how much life have we actually discovered? From deep-sea expeditions and biodiversity surveys to DNA analysis and museum collections, this episode unpacks how scientists identify, classify, and name new marine species, and why humanity may still know only a fraction of the organisms living on Earth. The conversation explores ocean biodiversity, taxonomy, extinction, climate change, and the growing urgency of documenting life in the sea before ecosystems are permanently altered. A fascinating look at ocean exploration, scientific discovery, and the hidden complexity of life beneath the surface.

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Episode Guests: Dr. Manuel Callebar Gutierrez
Browse Dr. Callabar Gutierrez's publications on Research Gate

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Episode Transcript and more information on the Pine Forest Media website
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Hosted, produced, and edited by Clark Marchese
Cover art by Jomiro Eming
Theme music by Nela Ruiz
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What happens at the deepest points of the ocean? This week on Oceanography, we’re sharing a special feed drop episode from Deep Sea Pod, hosted by Thomas Linley and Alan Jamieson — two scientists many of you may already recognize from previous Oceanography episodes like What Is the Deep Sea Even Like? and Ocean Trenches Explained.

In this episode, Professor Alan Jamieson takes listeners on a deep dive into the hadal zone: the deepest and most extreme region of the ocean, including the massive trenches that extend nearly 11 kilometers beneath the surface. The conversation explores how scientists study these remote environments, what kinds of organisms survive under immense pressure, the history of deep trench exploration, and why the hadal zone remains one of the last great frontiers in marine science.
If you enjoy the episode, be sure to check out Deep Sea Pod using the link in the episode description.
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Episode Guests: Alan Jamieson and Thomas Linley
Listen to Deep Sea Pod

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Where does climate change stand in 2026? This week on Oceanography, we’re bringing you a special crossover from Green Frequency: a new Earth Radio show from Pine Forest Media exploring environmental science, policy, and the systems shaping our planet. In this episode, climate scientist Dr. Claudio Piani joins a conversation on where we actually stand today: global emissions trends, the future of the Paris Agreement, and why every fraction of a degree of warming still matters. Alongside student activist Averie Gannon, the discussion moves beyond headlines to offer a more grounded, nuanced understanding of climate change—what the data says, where progress is being made, and where major challenges remain. If you enjoy this episode, you can find more from Green Frequency, featuring scientists, advocates, and frontline perspectives, on all major podcast platforms.

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Episode Guest: Dr. Claudio Piani
Special thanks to the American University of Paris

Our World In Data - CO2 emissions, temperature, and per capita trends.
The Scientific American - Global Average Temperature Targets
International Renewable Energy Agency - The Cost of Renewable Energy

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Hosted by Clark Marchese and Averie Gannon
Audio Editing by Clark Marchese, Video Editing by Oscar Padula
Videography and Set Design by Le Studio Du Passage

Cover Art by Laurel Wong
Theme music by Nela Ruiz

Find some more Pine Forest Media podcasts below
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Elephant seals are helping map the Southern Ocean. This week on Oceanography, we’re sharing a special crossover episode from South Pole, another Pine Forest Media series focused on Antarctic science and research. In this episode, Dr. Clive McMahon explains how southern elephant seals are being equipped with ocean sensors to collect real-time data in one of the most remote and extreme environments on Earth. These deep-diving animals gather information on temperature, salinity, depth, and ocean productivity; especially during the Antarctic winter, when human access is nearly impossible. The conversation explores elephant seal behavior, population decline, Antarctic bottom water, and how animal-borne data is advancing oceanography, climate science, and weather forecasting. A fascinating look at how marine life is contributing directly to scientific discovery.

If you enjoy this episode, you can find more from South Pole, a series dedicated to the science of Antarctica, on Spotify or Apple Podcasts, or all major platforms.

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Episode Guest: Dr. Clive McMahon
Review the research publication discussed in the episode here
Visit Dr. McMahon’s publications on Google Scholar

Visit the website of the Sydney Institute of Marine Sciences

Episode Transcript and more information on the Pine Forest Media Website
Follow Pine Forest Media on Instagram @pineforestmedia
Hosted, produced, written, and edited by Clark Marchese
Cover art and PFM logo by Laurel Wong.
Theme music by Nela Ruiz
Find some more Pine Forest Media podcasts below

Listen to Oceanography on Spotify or Apple Podcasts
Listen to Plastic Podcast on Spotify or Apple Podcasts
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Solar geoengineering is a justice question. As sunlight reflection methods move from theory toward real-world research, who gets to decide what happens next? This episode explores the justice and governance questions surrounding solar geoengineering, also called solar radiation modification or SRM. Hassaan Sipra of the Alliance for Just Deliberation on Solar Geoengineering explains why the risks of climate intervention cannot be separated from existing inequalities in climate change, especially for climate-vulnerable communities in the Global South. The conversation covers environmental justice, public participation, free, prior and informed consent, governance gaps, research transparency, and why climate intervention must never replace emissions cuts, adaptation, climate finance, or loss and damage. A grounded, accessible finale to Oceanography’s marine climate intervention arc.

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Episode Guests: Hassasn Sipra
Learn more about justice and SRM on the DSG website.
Listen to Pine Forest Media’s NEWEST PODCAST GREEN FREQUENCY
Episode Transcript and more information on the Pine Forest Media website
Follow Pine Forest Media on Instagram @pineforestmedia
Hosted, produced, and edited by Clark Marchese
Cover art by Jomiro Eming
Theme music by Nela Ruiz
Find some more Pine Forest Media podcasts below

Listen to Plastic Podcast on Spotify or Apple Podcasts
Listen to South Pole on Spotify or Apple Podcasts
Listen to Something in the Water on Spotify or Apple Podcasts
Hosted on Acast. See acast.com/privacy for more information.