A rise of 5C would be a temperature the world has not seen for 30 to 50 million years. We've been around only 100,000 years as human beings. We don't know what that's like.
There has been an earth for a little more than a billion years. As for the question of the end of it I advise: Wait and see!
Evolution is an unproven theory. If what its fundamentalist supporters believe is true, fishes decided to grow lungs and legs and walk up the beach. The idea is so comically daft that only one thing explains its survival-that lonely, frightened people wanted to expel God from the Universe because they found the idea that He exists profoundly uncomfortable.
But the whole vital process of the earth takes place so gradually and in periods of time which are so immense compared with the length of our life, that these changes are not observed, and before their course can be recorded from beginning to end whole nations perish and are destroyed.
All qualified physicists, biologists, cosmologists and geologists agree, on the basis of massive, mutually corroborating evidence, that the earth's age is at least four billion years.
Evolution, climate change, and the construction of the physical universe down to its atoms are processes that we measure in millions or billions of years.
No rock so hard but that a little wave may beat admission in a thousand years.
It gives liberty and breadth to thought, to learn to judge our own epoch from the point of view of universal history, history from the point of view of geological periods, geology from the point of view of astronomy.
Entire new continent can emerge from the ocean in the time it takes for a Web page to show up on your screen. Contrary to what you may have heard, the Internet does not operate at the speed of light; it operates at the speed of the DMV.
Geological age plays the same part in our views of the duration of the universe as the Earth's orbital radius does in our views of the immensity of space.
About a billion years ago, long before the continents had separated to define the ancient oceans, or their own outlines had been determined, a small protuberance jutted out from the northwest corner of what would later become North America.
All the great and beneficent operations of Nature are produced by slow and often imperceptible degrees. The work of destruction and devastation only is violent and rapid.
History and geology show what an eyeblink it's been since our current, comfortable culture came about. And yet that culture is using up absolutely everything at a ferocious rate.
It has taken these many hundreds of millions of years to fine-tune the Earth to a point where it is suitable for the likes of us.
