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  1. #1
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    The Mother of All Asteroids

    Dino asteroid hit 'worst possible place'


    The impact hit with the energy equivalent to 10 billion Hiroshima bombs.

    Scientists who drilled into the impact crater associated with the demise of the dinosaurs summarize their findings so far in a BBC Two documentary on Monday.

    The researchers recovered rocks from under the Gulf of Mexico that were hit by an asteroid 66 million years ago.

    The nature of this material records the details of the event.

    It is becoming clear that the 15-kilometre-wide asteroid could not have hit a worse place on Earth.

    The shallow sea covering the target site meant colossal volumes of sulphur (from the mineral gypsum) were injected into the atmosphere, extending the "global winter" period that followed the immediate firestorm.

    Had the asteroid struck a different location, the outcome might have been very different.

    "This is where we get to the great irony of the story – because in the end it wasn’t the size of the asteroid, the scale of blast, or even its global reach that made dinosaurs extinct – it was where the impact happened," said Ben Garrod, who presents The Day The Dinosaurs Died with Alice Roberts.

    "Had the asteroid struck a few moments earlier or later, rather than hitting shallow coastal waters it might have hit deep ocean.
    "An impact in the nearby Atlantic or Pacific oceans would have meant much less vapourized rock – including the deadly gypsum. The cloud would have been less dense and sunlight could still have reached the planet’s surface, meaning what happened next might have been avoided.

    "In this cold, dark world food ran out of the oceans within a week and shortly after on land. With nothing to eat anywhere on the planet, the mighty dinosaurs stood little chance of survival."

    Ben Garrod spent time on the drill rig that was stationed 30 km off Mexico's Yucatan Peninsula in April/May last year, to better understand the aims of the project; Alice Roberts visited widely separated fossil beds in the Americas, to get a sense of how life was altered by the impact.


    Rocks cores from up to 1,300 metres beneath the Gulf were recovered.

    The lowest sections of this material come from a feature within the crater called the peak ring.

    This is made from rock that has been heavily fractured and altered by immense pressures.

    By analysing its properties, the drill project team - led by Profs Jo Morgan and Sean Gulick - hope to reconstruct how the impact proceeded and the environmental changes it brought about.

    Chicxulub Crater - The impact that changed life on Earth
    An 18-km-wide object dug a hole in Earth's crust some 100 km across and 30 km deep
    This bowl then collapsed, leaving a crater about 200 km across and a few km deep
    The crater's central zone rebounded and collapsed again, producing an inner ring
    Today, much of the crater is buried offshore in the Gulf, under 600 metres of sediments
    On land, it is covered by limestone deposits, but its rim is traced by an arc of sinkholes

    They know now the energy that went into making the crater when the 15-km-wide asteroid struck - equivalent to 10 billion Hiroshima A-bombs. And they also understand how the depression assumed the structure we observe today.


    The team is also gaining insights into the return of life to the impact site in the years after the event.

    One of the many fascinating sequences in the BBC Two program sees Alice Roberts visit a quarry in New Jersey, where 25,000 fossil fragments have been recovered - evidence of a mass die-off of creatures that may have been some of the immediate casualties on the day of the impact itself.

    "All these fossils occur in a layer no more than 10 cm thick," paleontologist Ken Lacovara tells Alice.

    "They died suddenly and were buried quickly. It tells us this is a moment in geological time. That's days, weeks, maybe months. But this is not thousands of years; it's not hundreds of thousands of years. This is essentially an instantaneous event."

  2. #2
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    I suppose it was a "bang, not a whimper"...

  3. #3
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    Quote Originally Posted by BaitongBoy
    equivalent to 10 billion Hiroshima A-bombs.
    I find that hard to imagine.
    Not arguing, I'm literally incredulous with the enormity of it.

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    How do they figure this shit out?...And it's 66 million years ago?...These vast numbers seem to magically "fluctuate"...

    The Earth now is about 13.7 billion years old, right?...Last I heard...

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  6. #6
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    Holy fook...What happened there, kit?...Came up gibberish, here...

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    Thailand Expat misskit's Avatar
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    All I want to do is put up a map! Hope this one works.


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    Cheers...

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    So, it was just bad luck that it hit where it did. A minute or two later or earlier and dinosaurs would still be around....and we possibly would never have evolved.

    Hand of God once again!!!

  10. #10
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    Quote Originally Posted by BaitongBoy
    The Earth now is about 13.7 billion years old, right?...Last I heard..
    Mai chai krup... Earth is about 4.6 billion (the universe is about 14 billion) give or take...

    Unless you are a fundamentalist Christian.. then the world is 10,000 years old..

  11. #11
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    Quote Originally Posted by BaitongBoy
    "This is where we get to the great irony of the story – because in the end it wasn’t the size of the asteroid, the scale of blast, or even its global reach that made dinosaurs extinct – it was where the impact happened," said Ben Garrod, who presents The Day The Dinosaurs Died with Alice Roberts.
    actually not random, perfectly calculated by our Alien ancestors, so we could colonize earth

    Alien Theory 101

  12. #12
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    Yes, NZ...It's the universe, indeed...And Butters, this is not about Uranus...

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    ^ 555 good one, BB...

    Don't forget, Pluto is not considered a planet anymore.. it's been rejected (bit like me really)...

  14. #14
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    Thanks, BB.

    Very interesting OP

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    Quote Originally Posted by BaitongBoy View Post
    How do they figure this shit out?...And it's 66 million years ago?...These vast numbers seem to magically "fluctuate"...

    The Earth now is about 13.7 billion years old, right?...Last I heard...
    Not really surprised that you fail to comprehend it, or that you post falsehoods. It's science numb nuts.
    A fascinating insight to our planets history, almost ruined by a modern day dinosaur and his lack of understanding.
    Perhaps the BBC program can clear it up for you. Pictures will be so much easier for you to grasp.
    Heart of Gold and a Knob of butter.

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    There are alternative theories as to "some" ancient species demise that need to be readily explored and understood -

    Not that easily cut and dried, as the usual standard scientific theoretical probability analytics mold our perspectives.

  17. #17
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    Chastity, come of it, ya wee buffoon...

    Do you wanna start another thread about me since you are so well-informed on the "magical clock" we call the universe?...

  18. #18
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    Quote Originally Posted by BaitongBoy View Post
    Chastity, come of it, ya wee buffoon...

    Do you wanna start another thread about me since you are so well-informed on the "magical clock" we call the universe?...
    Not paying attention again. Tsk tsk.
    It's not magic, it's science.
    No point in starting a thread about you. Your bland, often ill informed commentary, is all over the forum, amplifying your dullness.

  19. #19
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    ^ Thought you finished your period last full moon...You're not making much sense...

    Quote Originally Posted by chassamui
    No point in starting a thread about you.
    Ah, but you did...And it went "pear-shaped," you silly wee lying bugger...

  20. #20
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    ^QED. .....

  21. #21
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    Sigh...Chastity, must you ruin another thread?...

  22. #22
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    Quote Originally Posted by BaitongBoy
    Sigh...Chastity, must you ruin another thread?...
    Already ruined when you started it and made inaccurate comments about it. You can't blame others because you are a lame brained halfwit.

  23. #23
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    ^ I worry for your sanity...Seriously...It's not just the period thing...

  24. #24
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    Quote Originally Posted by BaitongBoy
    I worry for your sanity...Seriously...It's not just the period thing...
    You are a sad, isolated bore and a pervert. Living so vicariously on a forum makes you a poor weirdo.

  25. #25
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    Enough spite, Chastity...Where are you living at the moment?...Heh...

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