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Up Next in Season 1

  • Transitional Fossils (Part 2)

    Transitional fossils supposedly represent animals in some intermediate stage of evolution—for example, between fish and land creatures, dinosaurs and birds, or ape-like ancestors and humans. Museums and textbooks cite various “transitional” fossils as rock-solid evidence for evolution. Here’s how...

  • Dating Method Assumptions

    Isn’t earth millions of years old? Common dating methods used to support this idea include analyzing ice cores, counting varves (sediment layers), and radioisotope dating. How do these methods work—and what assumptions do they involve? Let’s think about it.

  • Origin of Life (Part 1)

    What would have to happen for life to arise naturally from non-life? Let’s begin thinking through just some of the steps required. Along the way, we’ll see how to separate facts from assumptions in “origin of life” studies, including the famous Miller-Urey experiment.