Mike and Chad are revisiting this episode from 2022 about Dark Energy. What is it and where does it come from? Astrophysicists are still trying to understand the answers to these questions.

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Chad tells Mike about the dangers of diving in deep water, from nitrogen narcosis to the bends. Given these problems, we then discuss how some mammals have adapted to be able to swim to the bottom of the ocean.

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We had this conversation with Dr. Jo Handelsman in 2023 about farming practices and how to save our soils from erosion. It's something that I've thought about off and on periodically ever since.

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Mike and Chad invite meteorologist Chris McGinness into the studio to talk about how he can predict the weather and to define some terms that seem new to us.

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Mike and Chad invite Norman Birge, Professor of Physics at Michigan State University, and PhD advisor to Mike, to discuss some research into developing computers that use superconducting materials. Superconducting computers would create less heat, which would be helpful for large data centers.

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Chad and Mike relisten to this classic episode in which Stephen McCormick tells us about the life cycle of salmon. Salmon start their lives in fresh water then move to the ocean and only return to fresh water again to spawn. But many physiological changes have to occur for each of these steps.

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Mike and Chad discuss volcanoes. How do they form, and are they only Earthly events?

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Chad tells Mike about how bacteria can detect when there are enough of them around so that they can change their behavior. It's a collective action that seems smart, but is just a matter of responding to the environment.

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