Dagomar Degroot
Environmental historian and professor at Georgetown University specializing in how planetary and solar-system processes have shaped Earth and human culture, author of Ripples on the Cosmic Ocean.
Best podcasts with Dagomar Degroot
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Feb 16, 2026 • 31min
How our planet connects to the Solar System around it
Dr Dagomar Degroot, environmental historian at Georgetown and author of Ripples on the Cosmic Ocean, explores Earth's deep connections to the Solar System. He highlights orbital cycles, ice-age shifts and abrupt climate shocks. He compares climates on Venus, Mars and Titan and dramatizes how cosmic discoveries reshaped human thinking about our planet.
Jan 13, 2026 • 1h 16min
Dagomar Degroot, "Ripples on the Cosmic Ocean: An Environmental History of Our Place in the Solar System" (Harvard UP, 2025)
Dagomar Degroot, an environmental historian and author, dives into his book Ripples on the Cosmic Ocean, exploring the links between our planet and the solar system. He discusses how Martian dust storms influenced Cold War dynamics and how cosmic events have shaped human innovation. Degroot raises ethical questions about altering other worlds and warns of contamination risks from space exploration. He also highlights the vital role of the Sun, recounts near-misses from solar flares, and emphasizes the need for global cooperation in managing existential risks.
