Sentences with phrase «complex earth history»

Not exact matches

He reminds us that science is still ignorant of the chemical pathways that wonderfully allowed the inert chemicals of the earth's early history to form the more complex chemicals needed by even the simplest living organisms.

But with our planet as their guide, astrobiologists are forced to acknowledge that oxygen may be the least likely thing they will ever see — genetic evidence suggests the complex oxygen - producing photosynthetic pathway pioneered by cyanobacteria is an extraordinary evolutionary innovation that only appeared once throughout the entire multi-billion-year history of Earth's biosphere.

Yet if they are super-ancient, the mounds would demonstrate that complex microbes arose early in Earth's history.

What could be a more fascinating — or complex — natural system than the whole history of life's diversity on Earth?

There is no empirical evidence to support assertions and computer models that claim carbon dioxide drives climate change or to suggest that greenhouse gases have supplanted the complex natural forces that have produced big and little ice ages, floods and droughts, and stormy and quiescent periods throughout Earth's history.

A meditation on man's complex relationship with nature and an engaging history of the revolutionary achievements and missed opportunities of eco-activism, Earth Days looks at the dawn and development of the modern environmental movement.

This era in turn marks the most recent part of the Phanerozoic aeon, the 540m - year chunk of the Earth's history wherein rocks with fossils of complex organisms can be found.

We have BEST Climate Product Team Spokespeople who claim they can reduce understanding of the history of earth's complex climates into a squiggly line drawing... of course the only way to do it is complicated and full of assumptions, after - the - fact - adjustments and exclusion of adverse data, and can the only way it can be done is the way they do it.

The fact is that the earth's climate has been changing throughout the entire history of the planet as the result of a complex interaction between many variables.