Proverbe/citation du jour
«Si vous avez confiance en vous-mêmes, vous inspirerez confiance
aux autres.»-Johann Wolfgang von Goethe
Un matériau qui va radicalement changer le monde : le
graphène
Le graphène, qui a été découvert il y a dix ans à peine, est un
matériau qui va révolutionner le monde. Ce n'est qu'en 2010 que
l'on a commencé à s'y intéresser, alors que deux physiciens
britanniques ont reçu le prix Nobel pour leurs travaux à son sujet.
Il s'agit d'une forme de carbone et du matériau le plus mince et le
plus résistant au monde. Il est également un bon conducteur
d'électricité et de chaleur. Il n'est pas plus épais que d'un
atome et est à la fois le matériau le plus dur et le plus malléable
au monde.
20 citations d'Albert Einstein à retenir
1. Learn from yesterday, live for today, hope for tomorrow. The
important thing is not to stop questioning.
2. A person who never made a mistake never tried anything new.
3. It is the supreme art of the teacher to awaken joy in creative
expression and knowledge.
4. If you can’t explain it simply, you don’t understand it well
enough.
5. The true sign of intelligence is not knowledge but imagination.
6. Education is what remains after one has forgotten what one has
learned in school.
7. It’s not that I’m so smart, it’s just that I stay with
problems longer.
8. I have no special talent. I am only passionately curious.
9. The only source of knowledge is experience.
10. The only thing that interferes with my learning is my education.
11. When the solution is simple, God is answering.
12. The gift of fantasy has meant more to me than my talent for
absorbing positive knowledge.
13. Once we accept our limits, we go beyond them.
14. To raise new questions, new possibilities, to regard old problems
from a new angle, requires creative imagination and marks real
advance in science.
15. It is a miracle that curiosity survives formal education.
16. Intellectual growth should commence at birth and cease only at
death.
17. The process of scientific discovery is, in effect, a continual
flight from wonder.
18. We still do not know one thousandth of one percent of what nature
has revealed to us.
19. Most of the fundamental ideas of science are essentially simple,
and may, as a rule, be expressed in a language comprehensible to
everyone.
20. I used to go away for weeks in a state of confusion.
