Apr 04, 2006 15:55
"There is a wonderful thought exercise the American astronomer Harlo Shapley did many years ago, he said: ‘I want to follow a one breath of air and see what happens to it’, how do you do that? "Nineteen per cent of the air is oxygen, Eighty per cent of the air is nitrogen; nitrogen goes into your body. One per cent of the air is an element called argon, and if you remember your chemistry lessons from high school, you know that argon belongs to a class of elements called the noble gases.
...They do not react chemically with anything else, and they are chemically inert, kind of like CFC’s. So you breathe air in, argon goes into your body you breathe the air out and the argon comes right back out. So argon is a very nice marker for that breath of air, okay? Through argon we can follow the fate of that breath of air. How many argon atoms are there in a breath of air? Shapley calculates that there are 3x1018, that three followed by 18 zeros, you can take my word for it, that is a shit load a lot of argon.
Okay. So, let’s follow one breathe that comes out of my nose, imagine what happens to it. Through convention currents within a few minutes after that one breath at 3x1018, atoms begins to mix in the room. Within minutes, every one of you is breathing gazillions of argon atoms that were once in my body. But the doors are open out goes that argon and across Frankston, across Australia and around the world, then according to Shapley, one year later if we came back into this room, every breathe you take would have about 15 argon atoms from that one breath we took a year ago.
So on that basis, Shapley calculates every breathe you take has millions of argon atoms that
were once in the body of Joan of Arc and Jesus Christ and every breath you take has
millions of argon atoms that were in the bodies of dinosaurs 65 million years ago. That every
breathe you take will suffuse forms for as far as we can see into the future."
"About 100 billion (10^12) humans have been born over the history of our species, but there are 10^68 possible arrangements of 52 cards after a thorough shuffle. This means that if we assume every human ever to walk the earth shuffled a deck of cards trillions of times (impossible!), the odds that any arrangement you create when you shuffle has ever occured before are trillions (actually ~ 10^36) to one."