Silva
Moderator
 Inregistrat: acum 18 ani
|
|
Ismail a scris:
Discovery Channel: Understanding Time
http://i25.tinypic.com/10s92iw.jpg
Time - what is it? St. Augustine wrote, "What, then, is time? If no one asks me, I know. But if I want to explain it to someone, I do not know." Perhaps we should ask: Did time have a beginning? A very old question, indeed. But how can we imagine a world before time began? If we count backwards beyond the clock, beyond the calendar, three and a half billion years, we arrive at our own beginning - the dawn of life on earth. Science has a word for it: biogenesis. The birth of life. With life, nature created a new kind of time; more advanced, more evolved from the time of the physical world. Memory and expectation provided us with a competitive advantage. Memory and expectation gave birth to the concept of a past and a future. Now flash forward three and a half billion years. Humanity rules the earth. Humanity is wrapped tight in ticking time. But time ticks on towards the unknown. In physics, space is represented as three dimensions. Time is represented as the fourth dimension. To describe time, we are often asked to think of objects in motion. For instance, time has been compared to the cable that drives the quaint cable cars of San Francisco. The cable car attaches itself to something that's hidden, something that's to an extent, mysterious. It is moved by a mechanism you don't know and cannot see. It just moves you along - takes you on a ride. At birth, we are clamped to a buried cable, time. And at death, cast loose from its passage. Or are we? The answer lies somewhere in time, yet an understanding of time remains as elusive and mysterious as life itself.
Discovery Channel: Understanding Time
Discovery Channel: Understanding Sex
http://i26.tinypic.com/ei6pp3.jpg
What we are, in large part, depends on our genes. It is the hand we are dealt when we are born, and the cards we play our entire lives. You can study as hard you can, but some people will be smarter. Work out as much as you want. Some people are born to be bigger, or prettier, or more artistic. The hand you get depends upon the luck of the draw. Which genes you get from your mother, which you get from your father, and how they combine to make you a unique individual, is largely a matter of chance. In the game of life, the shuffling of genes to create a new individual is called sex. But life does not have to be this way. We humans believe we are more than that: as much what we think, what we believe, what we imagine and what we hope as what we are physically. And that can transcend the selfishness of our genes, the fight for fertility, and the siren song of sex. Don't call it "love" if you wish, but species other than humans don't seem to experience the idea as we do. The power of love in humans is so striking that it seems love could be the answer to some questions science has not yet asked. Sex, however, is easier to understand. For three billion years sex has been the way of life, shuffling physical characteristics and creating enough diversity to survive whatever hand Nature deals us. Life, sex, may be "in the cards" - in the hand we are dealt - but we humans are notorious for cheating, and perhaps outwitting and transcending, that hand nature has dealt us.
|
_______________________________________
"In politica, prostia nu este un handicap". - Napoleon Bonaparte
|
|
