Recent content by BillTre

  1. BillTre

    Today I Learned

    Many of Jimmy Cliff songs were upbeat and inspiring. Here is one of my favorite Jimmy Cliff songs:
  2. BillTre

    Today I Learned

    Beware, many raccoons in the US have rabies.
  3. BillTre

    Today I Learned

    Although central to understanding DNA, Watson got weird and left a highly conflicted legacy. On the other hand, I just read that Jimmy Cliff, whom I have more appreciation for, died. 😎
  4. BillTre

    Magnetoreception in Animals

    Alternatively, they could have a look up table of what behavior to do if certain cues are encountered. (Turn right at the 7-11, turn left at stop light, stop at the Big-5 store.) This is similar to strategies used by neuronal growth cones as they navigate their way through the developing body...
  5. BillTre

    Random Photos

    Once I was snorkeling in a kelp forest off of one of the Catalina islands off of California. The water was deep and cloudy and the bottom could not bee seen. All of a sudden a large (non-seal) pinniped shot up from the bottom to get some air. It was about 5 or 6 feet across as it hug out at...
  6. BillTre

    Magnetoreception in Animals

    They also use sensing of complex sets of chemicals to identify the specific branches of streams they were in as a young fish. So, the complexity can be headache inducing.
  7. BillTre

    Random Photos

    I'm no expert, but sea lions are huge. That might be a seal (no external ears).
  8. BillTre

    Magnetoreception in Animals

    The animals would probably have worked things out through generations of selection. Confusion would be non-adaptive and eliminated. Personally, I would expect something like an overlay on the normal visual field (which is also combined at some neural level with audio inputs). this would most...
  9. BillTre

    Magnetoreception in Animals

    You mean when the earth's geomagnetic field flips? What they do could mean: what does their nervous system do? (easiest) What does their behavior do? (controls difficult, variability high) How do they deal with it "mentally?" (most difficult) Some of this could be approached experimentally...
  10. BillTre

    Magnetoreception in Animals

    For more than a hundred years people have been intrigued by how animals are able to do certain navigating tasks so well. Being able to sense magnetic fields has been one of several clues animals could use to figure out where they should go. Among possible magnetic sensory mechanisms have been...
  11. BillTre

    Collection of Lame Jokes

    Probably a defense mechanism.
  12. BillTre

    Collection of Lame Jokes

    Where I live in Eugene, Oregon, the slug numbers have dropped. Things have gotten drier and we now have fewer snails. My slug census method is whether I could walk from the house to the garage at night without stepping on a slug (2 to 5 inches long!). 20 or 30 years ago had to be careful to...
  13. BillTre

    Collection of Lame Jokes

    But they keep braking out.
  14. BillTre

    Synonym for troupe

    Whatevver you end up using, you might want to consider introducing the term in a series of conversations that start with different words (like those suggested) which could help to define the word's use before the group (or whatever) finally settles on the term that gets used in the rest of the...