We all at some time or another think about life-changing catastrophes, but have you given much thought to Earth’s life-changing events? Most people have never heard of these catastrophes. 4 catastrophes that have happened to Earth 1. The Giant Impact Scientists think the Moon formed shortly after Earth around 4.5 billion years ago. A new ...
As ice sheets began melting at the end of the last ice age, a series of cataclysmic floods called the Missoula megafloods scoured the landscape of eastern Washington, carving long, deep channels and towering cliffs through an area now known as the Channeled Scablands. They were among the largest known floods in Earth’s history, and ...
When did the Earth reach oxygen levels sufficient to support animal life? The answer to this has implications regarding our search for life on other planets. Researchers from McGill University have discovered that a rise in oxygen levels occurred in step with the evolution and expansion of complex, eukaryotic ecosystems. Their findings represent the strongest ...
About 2.4 billion years ago, Earth’s atmosphere underwent what is called the Great Oxidation Event (GOE). Prior to the Great Oxidation Event, early Earth had far less molecular oxygen than we have today. After the Great Oxidation Event, molecular oxygen began to increase in abundance, eventually making life like ours possible. How the Great Oxidation ...
By confirming certain light-scattering dynamics first proposed a half-century ago, University of Nebraska–Lincoln physicists are casting fresh eyes on the universe-birthing fireworks ignited by the Big Bang nearly 14 billion years ago. With help from the ultra-intense lasers at Nebraska’s Extreme Light Laboratory and the ingenuity of colleagues at Brigham Young University, Husker researchers have ...
Let’s take a journey into the depths of the Earth, down through the crust and mantle nearly to the core. We’ll use seismic waves to show the way, since they echo through the planet following an earthquake and reveal its internal structure like radar waves. Down near the core, there are zones where seismic waves ...
It appears the Earth’s magnetic poles are changing. At the beginning of March 2021, K2 Airlines pilot Kris Pam was flying over Murdoch Glacier and found that it was flowing, with a large number of newly formed cracks visible. It looked like the entire glacier was being torn apart. He was quite shocked and took ...
The first emergence and persistence of the continental crust on Earth during the Archaean Eon (4 billion to 2.5 billion years ago) have important implications for plate tectonics, ocean chemistry, and biological evolution, and it happened about half a billion years earlier than previously thought, according to new research being presented at the EGU General Assembly 2021. ...
A recent review provides a systematic overview of the latest advances in the oxygen cycle at different spatial and temporal scales and the important role that oxygen plays in shaping our current habitable Earth. As an essential material for the survival and reproduction of almost all aerobic organisms, oxygen is closely related to the formation ...
Pierfranco Demontis said in 1988: “Ice becomes a fast-ion conductor at high pressure and high temperatures,” but his prediction was only hypothetical until recently. After 30 years of study, superionic phases of water ice were verified experimentally in 2018. Superionicity may eventually explain the strong magnetic field in giant planetary interiors and Earth’s deep mantle. ...
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