Random Analogies
"Our bodies have essentially two ways of solving the organizational problems raised by coordinating billions of semi-independent cells. In hormonal systems, master control cells broadcast potent signals all other cells must obey. Steroid hormones like estrogen or testosterone enter the body's cells, penetrating their nuclei and directly controlling gene expression. The endocrine system is like an immensely powerful dictatorship, issuing sweeping edicts that all must obey."
"I'll admit to a bit of a love for playing with their interactive routemap, too. I like thinking about how and where I'd start on an open-jaw lightweight dash around Europe. Newquay to Girona for Barcelona. Girona to Billund. Overland to Hamburg, then Hamburg to Milan. Overland to Turin, then Turin to Trapani. The carbon footprint is like a giant Doc Marten...but it's fun to play with the routemap."
"The body's cerebrospinal fluid is like a hydraulic pump. Subtle pulses of this fluid circulate around the brain and spinal cord, nourishing all tissues that make up the central nervous system. "
"the way I see it, Edward Snowden is like a real life Jason Bourne in the sense that he is running from extremely powerful forces within our government that want to erase him at any cost. the scary part for Mr Snowden is that he does not possess the level of survival skills that his movie counterpart did."

