Earth's oxygen levels rose and fell more than once hundreds of millions of years before the planetwide success of the Great Oxidation Event about 2.4 billion years ago, new research from the University of Washington shows.
Earth Sciences
Jul 9, 2018
1
169
A new study shows that iron-bearing rocks that formed at the ocean floor 3.2 billion years ago carry unmistakable evidence of oxygen. The only logical source for that oxygen is the earliest known example of photosynthesis ...
Earth Sciences
Oct 6, 2015
1
4135
In recent years, the number of extra-solar planets discovered around nearby M-type (red dwarf stars) has grown considerably. In many cases, these confirmed planets have been "Earth-like," meaning that they are terrestrial ...
Astronomy
Jan 15, 2019
6
20
A UWA geologist has proposed a hypothesis which threatens to overturn conventional notions of the way Banded Ironstone Formations (BIF) first evolved.
Earth Sciences
Mar 3, 2015
2
31
Oxygen levels in the Earth's atmosphere are likely to have "fluctuated wildly" 1 billion years ago, creating conditions that could have accelerated the development of early animal life, according to new research. 
Evolution
Oct 14, 2022
1
179
Scientists have long debated how much molecular oxygen was in Earth's early atmosphere. About 2.4 billion years ago, there was a rise in oxygen that transformed Earth's atmosphere and biosphere, eventually making life like ...
Earth Sciences
Sep 30, 2021
1
508
A University of Wyoming researcher contributed to a paper that determined a "Snowball Earth" event actually took place 100 million years earlier than previously projected, and a rise in the planet's oxidation resulted from ...
Earth Sciences
Feb 6, 2017
0
478
A new study suggests that rapid cooling within the Earth's mantle through plate tectonics played a major role in the development of the first life forms, which in turn led to the oxygenation of the Earth's atmosphere. The ...
Earth Sciences
Jun 7, 2018
1
138
(PhysOrg.com) -- Bacteria that produce oxygen may have evolved hundreds of millions of years earlier than previously thought, a new study into ancient rock formations in Western Australia suggests.
Earth Sciences
Sep 9, 2010
0
1
In "The Sign of the Four" Sherlock Holmes tells Watson he has written a monograph on 140 forms of cigar-, cigarette-, and pipe-tobacco, "with colored plates illustrating the difference in the ash." He finds the ash invaluable ...
Earth Sciences
Aug 19, 2010
1
0
