Why we have fingernails & other awesome answers - Greg Foot Q&A (Ep 10) - Head Squeeze
06:30

Why we have fingernails & other awesome answers - Greg Foot Q&A (Ep 10) - Head Squeeze

Key Facts In This Video

  • 1

    Fingernails and hair are both made from a protein called keratin. (5:06)

  • 2

    The oldest evidence of fingernails in human decedents date back to 55.8 million years ago. (5:27)

  • 3

    Many other species exhibit fingernail-like attributes, demonstrating the trait's evolutionary lineage. (5:58)

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