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View Diary: Open thread for night owls: A rule for opinion writers—avoid arguing with the weakest links (145 comments)

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  •  Now a person who says something like this: (1+ / 0-)
    Recommended by:
    Angie in WA State
    The birth control pill is the KT-Boundary divide of American culture.
    The brain that thought that thought must be pretty interesting....
    •  Except..... (0+ / 0-)

      don't you mean C-T boundary rather than KT Boundary....as
      to the Cretaceous-Tertiary Boundary?

      •  KT is a sedementary layer of iridium (1+ / 0-)
        Recommended by:
        LakeSuperior

        which is found the world around - and is believed to be the remains of the comet/asteroid which killed off the dinosaurs when it hit the Caribbean just off the Yucatan Peninsula.

        Although I see that they are now calling this the K-Pg boundary.

        The Cretaceous–Paleogene (K–Pg) boundary (formerly known as the K–T boundary) is a geological signature, usually a thin band, dated to 66.0 Ma (million years) ago.[1] K is the traditional abbreviation for the Cretaceous period, and Pg is the abbreviation for the Paleogene period.
        From Wiki:
        In 1980, a team of researchers consisting of Nobel prize-winning physicist Luis Alvarez, his son, geologist Walter Alvarez, and chemists Frank Asaro and Helen Michels discovered that sedimentary layers found all over the world at the K–Pg boundary contain a concentration of iridium many times greater than normal (30 times background in Italy and 160 times at Stevns).[4] Iridium is extremely rare in the earth's crust because it is a siderophile, and therefore most of it travelled with iron as it sank into the earth's core during planetary differentiation. As iridium remains abundant in most asteroids and comets, the Alvarez team suggested that an asteroid struck the earth at the time of the K–Pg boundary.[4] There were other earlier speculations on the possibility of an impact event, but no evidence had been uncovered at that time.[5]


        "I like paying taxes...with them, I buy Civilization"

        by Angie in WA State on Thu May 02, 2013 at 10:31:31 AM PDT

        [ Parent ]

    •  Based on the writing over the years which I have (1+ / 0-)
      Recommended by:
      a gilas girl

      read under Gooserock's banner?

      You would be correct.


      "I like paying taxes...with them, I buy Civilization"

      by Angie in WA State on Wed May 01, 2013 at 10:59:01 PM PDT

      [ Parent ]

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