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    mohd danish's Avatar
    mohd danish Posts: 2, Reputation: 1
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    #1

    Oct 23, 2007, 08:38 AM
    What is the evidence given by scientistic to support that an asteroid caused mass extinction of plant and animal life?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Oct 24, 2007, 03:37 AM
    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.
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #3

    Oct 24, 2007, 03:45 AM
    The main evidence actually comes from the fossil record, rather than the crater.

    See Cretaceous–Tertiary extinction event - Wikipedia, the free encyclopedia
    JimGunther's Avatar
    JimGunther Posts: 436, Reputation: 38
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    #4

    Jul 4, 2008, 10:40 PM
    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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