The unwaking world was as hushed as a deep forest.

For better or worse, zoos are how most people come to know big or exotic animals. Few will ever see wild penguins sledding downhill to sea on their bellies, giant pandas holding bamboo lollipops in China or tree porcupines in the Canadian Rockies, balled up like giant pine cones.

Perhaps nature is our best assurance of immortality.

I would I were alive again To kiss the fingers of the rain, To drink into my eyes the shine Of every slanting silver line, To catch the freshened, fragrant breeze From drenched and dripping apple-trees. For soon the shower will be done, And then the broad face of the sun Will laugh above the rain-soaked earth Until the world with answering mirth Shakes joyously, and each round drop Rolls twinkling, from its grass-blade top.

There's a lot of cruelty going on all the time, and I'm not just talking about inter-human cruelty. I'm talking about whole species becoming extinct, asteroids hitting planets, black holes gobbling up stars.

We say that the faces of coming generations are looking up from the earth. So when you put your feet down, you put them down very carefully - because there are generations coming one after the other. If you think in these terms, then you'll walk a lot more carefully, be more respectful of this earth.