The Common Descent Podcast Episode 223 - Mutations
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Aug 3, 2025 Discover the fascinating world of mutations, the driving force behind evolution and genetic diversity. The hosts dive into how these changes occur and their impact on species, using engaging examples like lactose tolerance and antibiotic resistance. They also explore Neanderthal tools and their surprising complexities, alongside recent findings in dinosaur behavior through unique footprints. Unravel the myths surrounding mutations, their role in health, and how nature delicately balances beneficial and harmful changes.
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Neanderthal Multi-Tools From Cave Lions
- Neanderthals crafted multifunctional bone tools from cave lion bones, some reshaped over time into different tools.
- Tool dimensions were highly consistent, implying learned techniques and cultural transmission.
Terror Bird Leg Shows Caiman Bite Marks
- A Miocene terror bird leg bone from Colombia shows four caiman tooth pits and no healing, indicating predation or scavenging.
- 3D scans matched a medium-sized caiman as the likely biter, revealing predator interactions among top predators.
Dinosaur Scrape Marks Suggest Dancing
- Scrape-mark trackways at Dinosaur Ridge match lek-like courtship displays by ostrich-sized theropods.
- Multiple layers and repeated use suggest a dedicated display area used over time by several individuals.
