During our recent trip to the Oregon coast, Kendall and I visited the Oregon Coast Aquarium. Of all the wonderful creatures we saw, I was particularly taken with the jellyfish and the sea otters. I could have watched them for hours, though for quite different reasons. The jellyfish moved with a gentle rhythm, their delicate bodies opening and relaxing as they drifted and pulsed through the water. Jellyfish are carried by currents, but they also propel themselves by contractin