We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet.
Stephen HawkingRead
Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'
Interpretation
The quote reflects how innovative ideas can be dismissed by mainstream science, and the fear of ridicule can silence exploration.
In this quote, Stephen Hawking expresses the challenges faced by scientists who explore unconventional ideas, such as time travel. It highlights how groundbreaking concepts can be seen as taboo or 'heretical' within the scientific community, and the fear of being considered eccentric or a 'crank' can deter open discussion and experimentation in these areas of thought.
In practice
During a lecture on futuristic technologies, I shared a quote by Stephen Hawking to discuss the boundaries of scientific acceptance.
We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet.
I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.
It surprises me how disinterested we are today about things like physics, space, the universe and philosophy of our existence, our purpose, our final destination. Its a crazy world out there. Be curious.
I was not a good student. I did not spend much time at college; I was too busy enjoying myself.
The world has changed far more in the past 100 years than in any other century in history. The reason is not political or economic but technological-technologies that flowed directly from advances in basic science. Clearly, no scientist better represents those advances than Albert Einstein: TIME's Person of the Century.
In my opinion, there is no aspect of reality beyond the reach of the human mind.
If an elderly but distinguished scientist says that something is possible, he is almost certainly right; but if he says that it is impossible, he is very probably wrong.
The impression sometimes created among the public is that scientists are working away in their labs, and maybe they're not always thinking about the implications of their work. But we are.
Astronauts will remain the explorers, the pioneers-the first to go back to moon and on to Mars. But I think it's really important to make space space available to as many people as we can. It's going to be a while before we can launch people for less than $20 million a ticket. But that day is coming.
I can assure you that no string theorist would be interested in working on string theory if it were somehow permanently beyond testability. That would no longer be doing science.
In a spiral galaxy, the ratio of dark-to-light matter is about a factor of ten. That's probably a good number for the ratio of our ignorance-to-knowledge. We're out of kindergarten, but only in about third grade.
Most Jupiter-sized planets orbit the mother star in a highly elliptical orbit. This means they will often cross the orbit of any Earth-like planet and fling it into outer space, making life impossible. But our Jupiter travels in a near-perfect circular orbit, preventing a collision with any Earth-like planet, making life possible.
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