Billions Quote by Stephen Jay Gould

The question of the origin of life is essentially speculative. We have to construct, by straightforward thinking on the basis of very few factual…

— John Desmond Bernal

“Life on earth evolved gradually beginning with one primitive life form – perhaps a self-replicating molecule – that lived more than 3.5 billion years…

— Jerry A. Coyne

Sometime in the first billion years, life appeared on the earth's surface. Slowly, the fossil record indicates, living organisms climbed the ladder from simple…

— Robert Jastrow

When it comes to the origin of life there are only two possibilities: creation or spontaneous generation. There is no third way. Spontaneous generation…

— George Wald

“600 million years ago, the monopolizing grip of the algae was broken and an enormous proliferation of new lifeforms emerged, an event called the…

— Carl Sagan

“When the Earth was only about a third of its eventual size, it was probably already beginning to form an atmosphere, mostly of carbon…

— Bill Bryson

We only recently figured out the origin of our own moon. And we have some idea of how the Sun and Earth formed, but…

— Neil deGrasse Tyson

The Earth has been lawned with life for something over 3.5 billion years. That's a span of time great enough to encompass some honest-to-goodness…

— Seth Shostak

People say life begins at conception, I say life began about a billion years ago and it's a continuous process.

— George Carlin

There are only two possible explanations as to how life arose: Spontaneous generation arising to evolution or a supernatural creative act of God.... There…

— George Wald

The physical fabric of the world had to be such as to enable that ten billion year preliminary evolution to produce the raw materials…

— John Polkinghorne

After all, the universe required ten billion years of evolution before life was even possible; the evolution of the stars and the evolving of…

— John Polkinghorne