Beyond the Anthropocene -“A Mere Blink of the Geologic Eye”

 

Alien Life

 

The human experience on our Pale Blue Dot “has lasted for less than 10 one-billionths of cosmic history surrounded by vast lifeless space, and yet we are congratulating ourselves on an unearned geological legacy before we’ve proved ourselves capable of escaping the next century with our lives,” says mass-extinction authority, Peter Brannen, author of The Ends of the World. “Human history, though environmentally cataclysmic and sedimentologically interesting, is not usefully described in the terms of a geological epoch on par with a yawning span of time like the Early Cretaceous, an epoch that lasted 600,000 times longer than this newly minted one.”

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The Chicxulub Impact -Did an ‘Impossible’ Magnitude-12 Earthquake Change Our World?

 

The Chicxulub Asteroid

 

Sixty-Six million years ago a 14 kilometer long, Mount-Everest sized asteroid blasted a hole in the ground, the Chicxulub Impact, releasing the equivalent of 100 million megatons of TNT creating a 20-mile deep, 110-mile hole and sterilizing the remaining 170 million square miles of the ancient continent of Pangaea, killing virtually every species on Earth and, oddly, paving the way for the emergence of the human species.

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The Point of No Return -Scientists Compare Current Climate Change to Geologic Past

 

Antarctica Climate Change

 

“As we put more greenhouse gases into the atmosphere and temperatures rise, we are quickly rewinding the climate clock to climate states not seen in human history,” wrote acclaimed University of Wisconsin paleo-climatologist Jack Williams in an email to The Daily Galaxy. “We can expect that over the next few decades, climates will most resemble those of the warm Pliocene, roughly three million years ago, or perhaps even the hothouse Eocene, 50 million years ago.”

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“The Great Collision” –Epic Unprecedented Change to Life On Earth

Oxygen Clouds

 

“Contrary to our first expectations, global climate was not the primary cause of this change in ocean oxygen and nitrogen cycling,” said biogeochemist Emma Kast currently at  the University of Cambridge about the planet’s dramatic increase in oxygen 55 million years ago. The more likely culprit? Plate tectonics. The collision of India with Asia — dubbed “the collision that changed the world” by Columbia University geoscientist Wally Broecker, a pioneer in the ocean’s role in climate change.— closed off an ancient sea called the Tethys, disturbing the continental shelves and their connections with the open ocean.

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Volcanic Activity on Venus — “May Have Radically Changed the First Habitable Planet in Our Solar System”

Venus Volcanoes

 

Recent research has revealed that Venus might have looked like Earth for three billion years, with vast oceans that could have been friendly to life. The early Venusian atmosphere was thinner and the young Sun was emitting less radiation, putting Venus in the habitable zone. There is a real possibility that Venus might have been the first habitable planet in our solar system and radically different from the Venus we see today. 

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Snowball Earth Era –“Changes in Earth’s Orbit Enabled Emergence of Complex Life”

Snowball Earth

 

In the blink of a geological eye, nearly 600 million years ago, a massive ice age radically altered the planet’s climate, resulting in a “Snowball Earth,” also known as the Cryogenian Period, severely constricting the oxygen supply on the planet. Scientists at the University of Southampton have proposed that changes in Earth’s orbit may have allowed complex life to emerge and thrive during the most hostile climate episode the planet has ever experienced. 

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