“The oxygen crisis that began only two billion years ago prompted the evolution of respiring bacteria. These microbes that used oxygen to derive biochemical energy more efficiently than ever before eventually took over most of the world. Some of the oxygen-breathing bacteria became symbiotic, merging with different (oxygen-eschewing) bacteria to form nucleated cells, which, after becoming sexual, evolved into fungi, plants, and animals.”

with Dorion Sagan, Dazzle Gradually: Reflections on the Nature of Nature (2007).

Adopted from Wikiquote. Last update June 3, 2021. History

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Lynn Margulis24

American evolutionary biologist 1938–2011

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“The earth had more oxygen in the past than it does now. Now you kids are going to be told in textbooks that the earth had no oxygen at the beginning, when life was evolving, called a "reducing atmosphere." That is baloney! […] It could not have evolved with oxygen, or without oxygen! But, if you double the air pressure and increase oxygen, not only does your hemoglobin take on oxygen, like it's supposed to, your plasma will get oxygen saturated, which means you could run hundreds of miles, without getting tired! Adam and Eve didn't need a car. They could run to grandma's.”

Kent Hovind (1953) American young Earth creationist

Creation seminars (2003-2005), The Garden of Eden

“What I am trying to do is to present a unified scientific view of life; that is, a view integrating life's biological, cognitive, and social dimensions. I have had many discussions with social scientists, cognitive scientists, physicists and biologist who question that task, who said that this would not be possible. They ask, why do I believe that I can do that? My belief is based largely on our knowledge of evolution. When you study evolution, you see that there was, first of all, evolution before the appearance of life, there was a molecular type of evolution where structures of greater and greater complexity evolved out of simple molecules. Biochemist who study that have made tremendous progress in understanding that process of molecular evolution. Then we had the appearance of the first cell which was a bacterium. Bacteria evolved for about 2 billion years and in doing so invented, if you want to use the term, or created most of the life processes that we know today. Biochemical processes like fermentation, oxygen breathing, photosynthesis, also rapid motion, were developed by bacteria in evolution. And what happened then was that bacteria combined with one another to produce larger cells — the so-called eukaryotic cells, which have a nucleus, chromosomes, organelles, and so on. This symbiosis that led to new forms is called symbiogenesis.”

Fritjof Capra (1939) American physicist

Capra (2007) in: Francis Pisani " An Interview with Fritjof Capra http://ijoc.org/ojs/index.php/ijoc/article/view/69/25" in: International Journal of Communication Vol 1 (2007).

“Oxygen is an accident. Breath is intentional.”

Erwan Le Corre (1971)

“Another panellist (Clive Anderson) suggested, "Don't give him the oxygen of publicity". "I'm not that happy with him having the oxygen of oxygen, actually," Linda replied.”

Linda Smith (1958–2006) comedian

A Brief History of Timewasting, Room 101, The News Quiz

“For the first half of geological time our ancestors were bacteria. Most creatures still are bacteria, and each one of our trillions of cells is a colony of bacteria.”

Richard Dawkins (1941) English ethologist, evolutionary biologist and author

The Richard Dimbleby Lecture: Science, Delusion and the Appetite for Wonder (1996)

“Effort is the oxygen for talent.”

P. L. Deshpande (1919–2000) Marathi writer, humourist, actor, dramatist

From his various literature
Source: These words are uttered by the lead character of his work with the same name - Sakharam Gatne.

“Most of the oxygen we breathe is made by ocean plankton. And when animals left the seas in which life arose, they took seawater with them, in their bodies — an internal environment crucial for cellular survival. We are, in a sense, soft vessels of seawater.”

Carl Safina (1955) American biologist

Source: [A sea ethic: floating the Ark, Blue Ocean Institute, 2005, http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.495.177&rep=rep1&type=pdf]

“The fundamental division of forms of life on Earth is not that between plants and animals, as is commonly assumed, but between prokaryotes—organisms composed of cells with no nucleus, that is, bacteria—and eukaryotes—all other life forms.”

Lynn Margulis (1938–2011) American evolutionary biologist

Microcosmos: Four Billion Years of Evolution from Our Microbial Ancestors (1986)

“Usage is like oxygen for ideas.”

Matt Mullenweg (1984) American entrepreneur

Ma.tt http://ma.tt/2010/11/one-point-oh/, 1.0 is the Loneliest Number, November 2010

“Mars is essentially in the same orbit. … Mars is somewhat the same distance from the Sun, which is very important. We have seen pictures where there are canals, we believe, and water. If there is water, that means there is oxygen. If oxygen, that means we can breathe.”

Dan Quayle (1947) American politician, lawyer

Press comment on Mars exploration http://bobpark.physics.umd.edu/WN89/wn090189.html (11 August 1989), televised on CNN, and referenced in "A Quayle Vision of Mars" in The Washington Post (1 September 1989)

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