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There was a “double whammy” of global volcanic agitation of Earth 66 million years ago at the same time that a
6-mile-wide outer space chunk of rock or ice slammed into the Gulf of Mexico creating the 12-mile-deep and 112-mile-wide Chicxulub crater that wiped out the dinosaurs.

Even more ancient back to 511 million years ago during the Early-Middle Cambrian, there was the first dramatic reduction in complex multicelluar life on Earth considered to be the first mass extinction. At that time, there were huge volcanic eruptions from the Kalkarindji volcanoes in Northern and Western Australia that covered 2 million square kilometers/ 772,204 square miles with deep lava.

Catastrophic volcanic eruptions also led to the huge die-off at the end of the Permian era. That die-off occurred about 250 million years ago and was the greatest mass extinction in Earth's history — 90% of marine species and 75% of land dwellers were wiped off the face of the planet over a period of 60,000 years. Ancient volcanic rocks now provide the best evidence yet that catastrophic volcanic activity triggered that extinction. Researchers have found that the eruptions started about 300,000 years before the mass extinction, continued during the die-off and lasted for at least 500,000 years after Earth life die-offs. Most of the lava, about two-thirds of the total, spewed out before and during that mass extinction.

Professor Michael Rampino at New York University in Manhattan thinks when the solar system passes through the more dense mid-plane of our Milky Way Galaxy, that gravitational pull and a dark matter later at the center of the galaxy not only perturb the comets out in the Oort Cloud, but that the core of our Earth might be agitated into coughing up the huge, long lasting volcanoes around the world during our planet's cyclic mass extinction events.

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99% of all the species on Earth that have ever lived are now extinct. Earth's history has been marked by periodic mass extinctions of this planet's evolving life forms. The dinosaurs thrived for about 135 million years until a 6-mile-diameter asteroid slammed into the Gulf of Mexico 66 million years ago leaving the 12-mile-deep and 112-mile-wide Chicxulub crater.

The theory is that so much dirt and debris was exploded into the atmosphere that sunlight could not reach plants. Without food, 75% of Earth life on land and sea, including the dinosaurs, starved to death.

What’s becoming more clear is that this extinction event has been happening about every 26 to 30 million years for at least 260 million years, according to Michael Rampino, Ph.D., Professor of Geology at New York University; and his colleague Ken Caldeira, Ph.D., an atmospheric scientists at the Carnegie Institution for Science.

In the September 2015 Monthly Notices of the Royal Astronomical Society, the two scientists showed new data about how the rate of craters on Earth have changed over time, specifically showing a cycle of impact craters that occur around the same time as mass extinction events.

The scientists’s hypothesis is that cycle hitting around every 26 to 30 million years is linked to the up and down motion of our Sun and solar system through the mid-plane of our Milky Way galaxy. That’s the densest part of our galaxy, filled with more matter and gravitational pull, so that when our sun and planets moves along that mid-plane axis, there will be gravitational perturbations all the way into the Kuiper Belt and Oort cloud of comets that surround our solar system. When that happens, comets get shaken into new orbits headed toward the inner solar system and increased chances of smashing into the planets, including Earth.

For more incredible science stories, Real X-Files, environmental stories and so much more. Please visit my site https://www.earthfiles.com/index.php To stay up to date on everything Earthfiles, follow me on FaceBook @EarthfilesNews and Twitter @Earthfiles. Be sure to subscribe to this Earthfiles Channel the official channel for Linda Moulton Howe https://www.youtube.com/user/Earthfiles. Have you seen all the playlists on our channel? Earthfiles 2017, Richard Dolan, Fade to Black with Jimmy Church and Linda Moulton Howe, Linda Moulton Howe on Truth be Told TV, Roswell UFO Festival, Earthfiles Podcasts and much more!