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-   -   Evidence for extinction (https://www.askmehelpdesk.com/showthread.php?t=144242)

  • Oct 23, 2007, 08:38 AM
    mohd danish
    What is the evidence given by scientistic to support that an asteroid caused mass extinction of plant and animal life?
  • Oct 24, 2007, 03:37 AM
    galactus
    A huge crater off the Yucatan peninula, I believe. Take it for what it's worth. This crater, they claim, dates to 65 million years ago and is large enough to have been caused my an extinction-level event asteroid.
  • Oct 24, 2007, 03:45 AM
    Capuchin
    The main evidence actually comes from the fossil record, rather than the crater.

    See Cretaceous–Tertiary extinction event - Wikipedia, the free encyclopedia
  • Jul 4, 2008, 10:40 PM
    JimGunther
    Another piece of evidence is the iridium layer all over the world that dates to the time of the impact. Iridium is a heavy metallic element not common on Earth but it is common in asteroids. Below the iridium leayer, dinosaur bones are common. Above it, they are not.

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