Theory Suggests Quote by James Nestor

The fact that this chain of life existed [at volcanic vents on the seafloor] in the black cold of the deep sea and was…

— Robert Ballard

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

... probably all the organic beings which have ever lived on this earth have descended from some one primordial form, into which life was…

— Charles Darwin

Seeing every height crowned with its crater, and the boundaries of most of the lava-streams still distinct, we are led to believe that within…

— Charles Darwin

“The earth was initially very hot and without an atmosphere. In the course of time it cooled and acquired an atmosphere from the emission…

— Stephen Hawking

Life began three and a half billion years ago, necessarily about as simple as it could be, because life arose spontaneously from the organic…

— Stephen Jay Gould

Before the discovery of these [underwater] vents, all life on Earth, the key to life on Earth, was believed to be the sun and…

— Mike deGruy

“To understand how the first tree appeared on Earth, we must look back more than 3 billion years to Earth’s cooling off and changing…

— Richard M. Ketchum

“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

All of us who study the origin of life find that the more we look into it, the more we feel it is too…

— Harold Urey

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

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