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Origins of life - Biology - Khan Academy
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Weaving together the relevant threads of astronomy, geology, chemistry, biophysics, and microbiology, this broadly accessible introductory text captures the excitement, controversy, and progress of the dynamic young field of astrobiology. They discuss in great detail the formation of the first galaxies and stars, the diverse chemistry of the primordial planet, the origins of metabolism, the evolution of complex organisms, and the feedback regulation of Earth's climate. Then last summer the honours transferred to Greenland, with the discovery of stromatolite traces dating to 3. Furthermore, the structures were encased in centimetre-sized nodules, which the researchers believe to be the products of putrefaction. In all cases the similarities were striking. This particular chunk of ocean floor was riddled with hydrothermal vents, bringing up hot, mineral-rich waters from below. Their claim is contentious, but if proven correct these fossils could push back the origins of life on Earth to as early as 4. The microscopic one tenth of the width of human hair tubes, knobs and filaments were found in a chunk of ancient ocean floor, known as the Nuvvuagittuq Supracrustal Belt.
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