The universe is the oldest and biggest thing in existence. If we could understand the universe then we would understand our existence. Where we came from? How we started? Is there god? Could all be answered by studying the initial state of the universe. Stephen Hawking in his TED talk explains this. According to laws of physics like Maxwell’s equations and Einstein's theory of relativity, time and space function as dimensions of space; thus, the laws of evolution apply to the initial condition of universe. The universe, then, can be created from nothing. There doesn’t have to be “Something” before the big bang, there might not be a god.
We are currently alone in our galaxy. Due to the lack of background radiation from alien radio waves or noise, scientists have concluded there are no aliens equal to our civilization within 100 light-years. Additionally, creating human life took 5 billion years after initial conditions were possible to support life. Thus,it will take a longer time for alien civilization to be created. However,due to civilizations self-destructive nature, an alien civilization may have already existed but has destroyed itself.
Finally, Stephen hawking concludes his speech with advice for humans to push forward on the frontier. The future of the human race depends on our exploration due to the limited supply of earth’s resources.
http://www.ted.com/talks/lang/eng/stephen_hawking_asks_big_questions_about_the_universe.html
No comments:
Post a Comment