Thus, human beings are now carrying out a large scale geophysical experiment of the kind that could not have happened in the past...Within a few centuries we are returning to the atmosphere and oceans the concentrated organic carbon stored in sedimentary rocks over hundreds of millions of years.
We thought of universities as the cathedrals of the modern world. In the middle ages, the cathedral was the center and symbol of the city. In the modern world, its place could be taken by the university.
We know less about the ocean's bottom than about the moon's back side.
Follow AzQuotes on Facebook, Twitter and Google+. Every day we present the best quotes! Improve yourself, find your inspiration, share with friends