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Earth Has a Pulse-A 27.5-Million-Year Cycle of Geological Activity

Earth Has a Pulse-A 27.5-Million-Year Cycle of Geological Activity
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Mass Extinctions Occur Every 27 Million Years, Study Finds


(Illustration by Anthony Hutchings/Friends of the NC Museum of Natural Sciences via Courthouse News)
(CN) — Scientists from New York University have found that mass extinctions of land-based animals are more predictable than previously thought, and occur roughly every 27 million years in a cycle likely due to our planetary orbit, according to a new study released Thursday.
The study, published in the journal Historical Biology, explains how our place in the galaxy has placed us into a cycle of mass extinctions caused by asteroid or comet impacts and subsequent volcanic eruptions.
The Earth has seen a handful of mass extinction events throughout its history from natural disasters, and experts say that without drastic change we are on track to experience another one. 

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"Dinosaur Dust to Future Apocalypse" --Earth's Mass Extinction Cycles


 
 
Sixty Six million years ago it would have been a pleasant day one second and the world was already over by the next, wrote Peter Brannen about the Mount Everest sized asteroid that 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.
“As the asteroid collided with the earth in the sky above it where there should have been air,” adds Brannen, “the rock had punched a hole of outer space vacuum in the atmosphere. As the heavens rushed in to close this hole, enormous volumes of earth were expelled into orbit and beyond—all within a second or two of impact.”

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Happening Every 27 Million Years: Mass Extinctions of Land-Dwelling Animals


Mass extinctions in 
vertebrate terrestrial or land-dwelling animals such as amphibians, reptiles, mammals, and birds occur at a cycle lasting approximately 27 million years.
This figure coincides with reported mass extinctions in ocean life in previous studies, as reported by a new publication by researchers in the
 
In addition, the study also found that the mass extinctions are in concurrence with known impacts of major asteroids as well as devastating eruptions of volcanoes, with lava outpourings known as flood-basalt volcanic eruptions, which provided the potential and possible cause of various extinctions.
According to the Department of Biology, New York University (NYU) professor and lead study author Michael Rampino, the cycle of 27 million years seem to be followed by the mass extinctions and internal pulse activity of the Earth, along with the impacts of large cosmic bodies such as asteroids.

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Study finds mass extinctions of Earth's land animals follow a cycle -- Science & Technology -- Sott.net


© NASA/Donald E. Davis
An artist's impression of a giant space rock slamming into Earth 65 million years ago near what is now Mexico's Yucatan Peninsula. A consortium of scientists now says this was indeed what caused the end of the Age of Dinosaurs.
Asteroids aren't completely random?
Mass extinctions of life on Earth appear to follow a regular pattern, a new study suggests.
In fact, widespread die-offs of land-dwelling animals - which include amphibians, reptiles, mammals and birds - follow a cycle of about 27 million years, the study reports. The study also said these mass extinctions coincide with major asteroid impacts and devastating volcanic outpourings of lava.

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