The first day of spring is one thing and the first spring day is another. The difference between them is sometimes as great as a month.
Mankind has probably done more damage to the Earth in the 20th century than in all of previous human history.
I am not a scientist. I am rather an impresario of scientists.
What is a scientist after all? It is a curious man looking through a keyhole...
No sooner does man discover intelligence than he tries to involve it in his...
There is no reason to repeat bad history.
There were various turning points, but the main one at the beginning was...
Look into the heavens and say, “It’s my turn to make history.
