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echidna

Short-beaked echidna
Photo: Short-beaked echidna, by Gunjan Pandey, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons.

Top Scientific Problems with Evolution: Homology

The spines of Australian echidnas and North American porcupines are remarkably similar. Read More ›
Haeckel's Embryos
Image: Haeckel's Embryos, via Wikimedia Commons.

So, Does Ontogeny Recapitulate Phylogeny? Nope

When I was younger, my family lived next-door to a retired dentist named Max. Before entering dentistry, Max studied biology at UC Berkeley. Read More ›

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