Friday, June 08, 2007

Takes a licking and keeps on ticking

Still coping with jet lag. Below is a diagram, with caption, of the mammalian circadian (circa-dian, almost daily) clock from a recent issue of Science. This is the protein-based chemical reaction in hypothalamic neurons and peripheral cells that ticks away in a 24-hour cycle. My clock is still keeping New England time even though I have translated my body across five time zones. One doesn't have to understand the science to appreciate the diagram and caption, I don't know which is more drop-jaw amazing -- the clock, or the fact that biologists have figured it out. (You can click to enlarge.)