early earth history
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The Biggest Killer in the History of Earth, Revealed - Motherboard (blog)

The Biggest Killer in the History of Earth, Revealed - Motherboard (blog) | early earth history | Scoop.it
The Biggest Killer in the History of Earth, Revealed
Motherboard (blog)
Scientists think they've fingered the single most prolific killer in the history of Earth. First, let's contextualize the killer's work.
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What ancient microbe discovery tells us about Earth's early years - Mother Nature Network

What ancient microbe discovery tells us about Earth's early years - Mother Nature Network | early earth history | Scoop.it
Mother Nature Network
What ancient microbe discovery tells us about Earth's early years
Mother Nature Network
"That means very early in Earth's history, microbes had switched from using rocks for its energy to using light," Hazen said.
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‘Cascade of events’ caused sudden explosion of animal life - University of Oxford

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Great Moments in Earth History: The Hadean | The Sieve

Great Moments in Earth History: The Hadean | The Sieve | early earth history | Scoop.it
For years, the commonly held view among geologists was that this time was wildly different from the rest of Earth history. The most dramatic pictures painted it as an age with vast magma oceans subject to constant and ...
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Clever and Inspiring Video Compresses 4.5 Billion Years of Earth’s History into One Minute

Clever and Inspiring Video Compresses 4.5 Billion Years of Earth’s History into One Minute | early earth history | Scoop.it
I love clever filmmakers. I love science. So of course, I love it when clever filmmakers makes clever science videos.
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Radioactivity and the earth (and moon?) | Metageologist - All-geo

Radioactivity and the earth (and moon?) | Metageologist - All-geo | early earth history | Scoop.it
These man-made explosions have left distinctive radioactive traces that may well outlive us all. It turns out that natural radioactivity, even fission reactions, played an interesting role in Earth's history long before we came along ...
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UT-Dallas scientist hopes tubes of earth tell dinosaurs' story - Dallas Morning News

UT-Dallas scientist hopes tubes of earth tell dinosaurs' story - Dallas Morning News | early earth history | Scoop.it
UT-Dallas scientist hopes tubes of earth tell dinosaurs' story Dallas Morning News John Geissman, a professor of geosciences at the University of Texas at Dallas, and his colleagues are drilling into Arizona's Petrified Forest National Park to...
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The Geologic Time Scale - Canon City Daily Record

The Geologic Time Scale - Canon City Daily Record | early earth history | Scoop.it
The Geologic Time Scale
Canon City Daily Record
Rocks contain minerals that contain chemical elements such as Uranium and Potassium.
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Increasingly likely 'Great Dying,' the worst extinction event in history, caused by super volcanos: Canadian research

Increasingly likely 'Great Dying,' the worst extinction event in history, caused by super volcanos: Canadian research | early earth history | Scoop.it
The 'Great Dying' at the end of the Permian era killed off a larger proportion of species than any of the 25 other mass extinctions scientists have identified (..Likely Great Dying, worst extinction event ...
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How first life emerged from deep-sea rocks

How first life emerged from deep-sea rocks | early earth history | Scoop.it
The origin of ion-pumping proteins could explain how life began in, and escaped from, undersea thermal vents.

 

Rocks, water and hot alkaline fluid rich in hydrogen gas spewing out of deep-sea vents: this recipe for life has been championed for years by a small group of scientists.  Now two of them have fleshed out the detail on how the first cells might have evolved in these vents, and escaped their deep sea lair. Nick Lane at University College London and Bill Martin at the University of Düsseldorf in Germany think the answer to how life emerged lies in the origin of cellular ion pumps, proteins that regulate the flow of ions across the cell's membrane, the barrier that separates it from the outside world.

 

In all cells today, an enzyme called ATP synthase uses the energy from the flow of ions across membranes to produce the universal energy-storage molecule ATP. This essential process depends in turn on ion-pumping proteins that generate these gradients. But this creates a chicken-and-egg problem: cells store energy by means of proteins that make ion gradients, but it takes energy to make the proteins in the first place. Lane and Martin argue that hydrogen-saturated alkaline water meeting acidic oceanic water at underwater vents would produce a natural proton gradient across thin mineral 'walls' in rocks that are rich in catalytic iron–sulphur minerals. This set-up could create the right conditions for converting carbon dioxide and hydrogen into organic carbon-containing molecules, which can then react with each other to form the building blocks of life such as nucleotides and amino acids.

 

The rocks of deep-sea thermal vents contain labyrinths of these tiny thin-walled pores, which could have acted as 'proto-cells', both producing a proton gradient and concentrating the simple organic molecules formed, thus enabling them eventually to generate complex proteins and the nucleic acid RNA. These proto-cells were the first life-forms, claim Lane and Martin.


Via Dr. Stefan Gruenwald
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