Big Picture Science for April. 20, 2026: Skeptic Check: Feeling Risky

Big Picture Science: Skeptic Check: Feeling Risky

REPEAT
It’s not just facts that inform our decisions. They’re also guided by how those facts feel. From deciding whether to buckle our seat belts to addressing climate change, how we regard risk is subjective. In this extended conversation with an expert on the psychology of risk, find out about our exaggerated fears, as well as risks we don’t take seriously enough. Meanwhile, while experts warn society about the dangers of self-aware AI – are those warnings being heeded?

Guest:

• David Ropeik – Professor emeritus Harvard University, and expert on the psychology of risk

Originally aired April 10, 2023

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Big Picture Science for April. 13, 2026: Old School

Big Picture Science: Old School

Antarctic scientists have long known the region’s ice sheet holds clues to the planet’s ancient past. Yet even the field’s foremost experts were shocked when they extracted a six-million-year-old ice core — twice as old as expected and the oldest recorded so far. Researchers say it will provide one of our best looks ever into Earth's climatological record. In a relatively more recent past, the discovery of 40,000-year-old notches and lines carved into artifacts and cave walls in Germany, examples of protowriting, suggest humans began documenting ideas thousands of years earlier than thought. Those timescales pale however, when compared to the age of the Earth’s most ancient rocks, which have a story to tell too. Find out how the planet’s most venerable rocks, formed billions of years ago, reveal the geological conditions that allowed life to get a foothold.

Guests:

• Huw Groucutt – Archeologist, Department of Classics and Archeology, University of Malta
• Ed Brook – Paleoclimatologist and professor of Earth, Ocean and Atmospheric Sciences at Oregon State University
• Simon Lamb – Earth scientist and professor of geography in the School of Geography, Environment and Earth Sciences at Victoria University at Wellington, New Zealand.   Author of “The Oldest Rocks on Earth: A Search for the Origins of Our World.”

Download podcast at - https://bigpicturescience.org/episodes/old-school

You can listen to this and other episodes at http://bigpicturescience.org/

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Big Picture Science for April. 06, 2026: Amazing Arctic

Big Picture Science: Amazing Arctic

REPEAT
What’s it like to live on a block of ice, especially when it thaws? An environment writer shares his forty-year experience in the Arctic, including the time a paddling polar bear tracked him on a river. He describes the stunning beauty of America’s last truly wild place and the dramatic changes to the landscape he recently witnessed. Recent research has backed up his eyewitness accounts, as an arctic scientist presents the latest data collected from a part of world warming four times faster than the rest of the planet.

Guests:

• Jon Waterman – Author of Into the Thaw: Witnessing Wonder Amid the Arctic Climate Crisis
• Twila Moon – Deputy Lead Scientist and Science Communication Liaison at the National Snow and Ice Data Center

Originally aired March 17, 2025

Download podcast at - https://bigpicturescience.org/episodes/amazing-arctic

You can listen to this and other episodes at http://bigpicturescience.org/

Get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!