jrepka

Last active
1 year, 7 months ago
  • jrepka commented on the diary post Asteroids, Dinosaurs, and the History of Physics by E. F. Beall.

    2013-02-17 18:05:12View | Delete

    I don’t think of it as egocentric, except inasmuch as we are all kind of egocentric about the ideas we bring to the table. It’s a human trait. And most scientists are human. The point of science is to be able to look at ideas from the outside, to test them against reality, and to [...]

  • jrepka commented on the diary post Asteroids, Dinosaurs, and the History of Physics by E. F. Beall.

    2013-02-17 11:28:32View | Delete

    William Glen wrote about how the geologic community gradually came to accept plate tectonics in “The Road to Jaramillo” (1982). He stated that the problem with writing about scientific revolutions after-the-fact is that few interviewees are willing to admit to being late adopters. His book about the impact hypothesis (The Mass Extinction Debates –1994) dealt [...]

  • jrepka commented on the diary post Asteroids, Dinosaurs, and the History of Physics by E. F. Beall.

    2013-02-16 21:27:01View | Delete

    Sorry, but you had said in a previous comment that you were concerned with how the theory was arrived at. I was trying to point out that the impact hypothesis wasn’t where Alvarez began, it was where he finished (I’m talking about Walter here, not Luis)…

  • jrepka commented on the diary post Asteroids, Dinosaurs, and the History of Physics by E. F. Beall.

    2013-02-16 20:52:49View | Delete

    The issue of a gradual-v-rapid extinction was the question they were trying to deal with. Remember, the K-P extinction involved on the order of 50% of species (mostly marine organisms), and was recognized by paleontologists before the first dinosaur fossils had been recognized. The question was, how much time did that 1 cm thick clay [...]

  • jrepka became a registered member

    2013-02-16 20:23:04View | Delete