Early life on Earth limited by enzyme
The enzyme-nitrogenase-can be traced back to the universal common ancestor of all cells more than four billion years ago.
Earth Sciences
Aug 22, 2019
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Page 11 - News tagged with atmospheric oxygen
What delayed Earth's oxygenation?
Powering a massive biosphere on Earth, photosynthesis is the light-mediated reaction that converts carbon dioxide and water to carbohydrates and oxygen. About 2.3 billion years ago, this reaction led to a dramatic oxygenation ...
Earth Sciences
Jul 12, 2019
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Plate tectonics may have driven Cambrian Explosion, study shows
The quest to discover what drove one of the most important evolutionary events in the history of life on Earth has taken a new, fascinating twist.
Earth Sciences
Jun 19, 2019
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Ammonium fertilized early life on Earth: study
A team of international scientists—including researchers at the University of St. Andrews, Syracuse University and Royal Holloway, University of London—have demonstrated a new source of food for early life on the planet.
Earth Sciences
May 21, 2019
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High-tech material in a salt crust
MAX phases are viewed as promising materials for the future, for example, in the power, aerospace and medical implants industries. A new method developed by scientists from Forschungszentrum Jülich now makes it possible ...
Materials Science
Apr 4, 2019
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Alien imposters: Planets with oxygen don't necessarily have life
In their search for life in solar systems near and far, researchers have often accepted the presence of oxygen in a planet's atmosphere as the surest sign that life may be present there. A new Johns Hopkins study, however, ...
Astronomy
Dec 17, 2018
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Oceanic dead zones thrived during last Ice Age, new evidence shows
Scientists recreated deep sea conditions from the last ice age and found that the tropical Pacific contained more carbon and less oxygen during that period than previously thought.
Earth Sciences
Oct 18, 2018
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Understanding of the evolution of Earth's ecology as oxygen levels changed
A new study has produced a detailed estimation for when there was enough oxygen in the Earth's atmosphere to support large land-based life, such as dinosaurs and eventually humans.
Earth Sciences
Oct 8, 2018
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Earth's oxygen increased in gradual steps rather than big bursts
A carbon cycle anomaly discovered in carbonate rocks of the Neoproterozoic Hüttenberg Formation of north-eastern Namibia follows a pattern similar to that found right after the Great Oxygenation Event, hinting at new evidence ...
Earth Sciences
Aug 31, 2018
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131
Continental microbes helped seed ancient seas with nitrogen
Like our oceans, today's continents are brimming with life. Yet billions of years ago, before the advent of plants, continents would have appeared barren. These apparently vacant land forms were believed to play no role in ...
Earth Sciences
Jun 29, 2018
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