The remarkable scientific story of how Earth became an oxygenated
planet
The air we breathe is twenty-one percent oxygen, an amount higher than
on any other known world. While we may take our air for granted, Earth
was not always an oxygenated planet. How did it become this way? Donald
Canfield--one of the world's leading authorities on geochemistry, earth
history, and the early oceans--covers this vast history, emphasizing its
relationship to the evolution of life and the evolving chemistry of the
Earth. Canfield guides readers through the various lines of scientific
evidence, considers some of the wrong turns and dead ends along the way,
and highlights the scientists and researchers who have made key
discoveries in the field. Showing how Earth's atmosphere developed over
time, Oxygen takes readers on a remarkable journey through the history
of the oxygenation of our planet.