The Flannelcasters talk about a possible ocean in early Earth history that covered the globe, newly discovered ways that humans are affecting relative sea-level rise, and how the oldest meteorite ever discovered is pretty unique.
Links:
Ancient Earth Really Was a Serene Water World, New Evidence Confirms
Sea-Level Rise Affects Coastal Areas 4 Times Faster Than We Thought. Here's Why
4.6-billion-year-old meteorite is the oldest volcanic rock ever found