TTC – A New History of Life
Life is stranger than fiction. Recent investigations hint at episodes in the history of life on Earth that rival the most imaginative movies. For example: Could our planet have been seeded with life from elsewhere? Did the development of life create conditions that threatened to poison the biosphere? How have natural forces conspired, over and over, to remove most traces of life from the planet? And how has life itself responded with determination to survive and thrive in a multitude of astonishing forms?
The story of our world and the different living things that have populated it is an amazing epic with millions of species both familiar and strange, exotic settings, planet-wide cataclysms, and surprising plot twists. Humans are only the latest characters in this long-running drama, which has always been utterly unpredictable, since periodic mass extinctions are inevitably followed by life rebounding in unexpected ways. Indeed, life and the planet have developed together, each driving the evolution of the other.
Equally intriguing are the details of how scientists know what they do about the past. It is a detective story as riveting as any forensic thriller, with paleontologists and geologists taking the most unassuming pieces of evidence-a bit of fossil bone, a sequence of layers in rock, a geochemical test-and reading a rich narrative of past events. And by drawing on tools from other disciplines, such as biology, meteorology, and astrophysics, the scenes they describe can be truly monumental in scope, encompassing the entire Earth and even phenomena beyond the planet.
This multidisciplinary effort to understand Earth as a whole, as a system composed of many interacting parts, is called Earth system science, and it has given us an unprecedented understanding of the planet and the unfolding panorama of life.
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