Notes for June 21st

• Faster than light travel...kinda.  The author of this post asks you to consider dominoes.  If you tip one domino, it slowly tips, and falls into the next, and then into the next, and so on.  However, you could (if you wanted to) run your hand along the dominoes and knock them down faster than they would if you just allowed each domino to fall into the next.  Now, imagine that instead of dominoes, we're talking light.  You could just let the light propagate at whatever speed it normally propagates at (the speed of light).  Or you could impose a greater velocity on it (I'm not sure how).  Does this make sense to you?  If so, let me know, because I'm totally confused.
• There isn't a fossil more odd than Hallucegenia.  Or at least, that was everyone's understanding for a long time.  Flip it over, though, and it doesn't seem so odd.  This is probably a good example of just how much we don't know.
• I see crayfish in the title and I'm automatically interested.  And yes, this is interesting, about how crayfish make decisions about flight or fight.
• More Tet-Zoo awesomeness.  Ducks and Geese.