Every so often, throughout the existence of our planet, something similar to a cleansing event takes place. There have been documented episodes within the history of Earth when the majority of species around the planet have gone extinct at seemingly same points of time. These identified periods of planetary purification have come to be called extinction events.
Ther have been five mass extinction events throughout the course of Earth’s existence. The first mass extinction event occurred at an estimated 440 million years ago. The Ordovician-Silurian Extinction happened when ice levels rose around the planet, trapping areas of fresh water from the access of living creatures. The increase of ice caused sea levels to drop, leading to losses of life throughout many usually oceanic regions of Earth.
The Late Devonian Extinction happened at an estimate of 360 million years passed, when nearly seventy percent of marine life was eliminated. This was alleged to have happened over a course of twenty million years. An extended portion of this extinction period extended to areas between 100,000 years and 300,000 years, eliminating extreme amounts of sea life.
The Permian-Triassic Extinction is being labeled as the greatest of the Earth’s most devastating dying episodes. This was 250 million years in Earth’s past. Ninety percent of all life died at that time. Speculations include theories of an asteroid impact, extreme volcanic eruptions, and a combinaton of both of these deadly occurrences. Over ninety percent of life on Earth died within this extinction event.
It was 200 million years in the past when The Triassic-Jurassic Extinction Event took place. Here, roughly twenty percent of marine life vanished, along with most extreme-sized amphibians, most near-mammals, and all of the pre-dinosaurs that are called archosaurs. It is speculated that this extinction event occurred because of an asteroid impact to Earth, yet no underground evidence has been excavated to prove this theory.
Possibly the most recognized of all of the extinction events is The Cretaceous-Tertiary Extinction, also called the K/T Extinction Event. This is the extinction event that occurred sixty-five million years ago, leading to the disappearance of the dinosaurs. The Chixulub impact site off of The Yucatán Peninsula is where an asteroid crater currently exists, dating back to the general time when all dinosaurs, along with half of all other species on Earth, were eliminated.
Some scientists are speculating that we are on the verge of entering a sixth extinction period. There remains the underground chatter of asteroid impact within the next six to twelve months. Yet, as that seems unlikely, it remains necessary to examine the actual causes that could lead to such extreme life erasure and overall devastation to our Earth.
Much evidence is pointing toward humanity as the prime perpetrator of this point of planetary life privation. It is being stated with much scientific evidence, that the actions of human beings will have driven Earth to a point where she/it can no longer sustain life on a major scale. Warning signs are appearing blatantly, which include the depletion of the ozone layer, global warming, and currently excessive losses of animal and plant species. A poll that was given to biologists around the planet revealed that seventy percent of them believe that Earth currently is in the initial throes of a mass extinction period.
What do we do? What can we do? Suggestions, demands are being made that point toward the needs to handle the most obvious problems, first. This does include putting a handle on human-inflicted damages to Earth, along with creating restrictions to currently unchecked human activities that continue to ravage the planet. If actions are not made to correct contaminations, to patch the problems caused by pollution, and to stop our singular mindset of being the only items of significance to Earth, then we will fall easily into this sixth mass extinction period. Yet, beliefs must stand that we can transcend what is being projected, showing that we can put a stop to the actions that are wrecking our world, and that we can reverse all which can be reversed, so that our Earth will remain for generations of species that may exist within eons to come!
SEE THESE SITES!!!
I was reading another posting about recent discoveries of extrasolar planets, and this particular revelation was interesting. It is amazing to learn about how many new and fascinating things are being discovered from our current studies of the universe. Indeed, I really want to believe that it only is a short matter of time before someone, something responds to our searches!
A recent observation of outer space has given information about a planet that is racing around it’s host star, and being highly irradiated in the process. This world is KELT-1b, named for The Kilodegree Extremely Little Telescope – North that is at The Winer Observatory, outside of Sonoita, Arizona. This is one of a pair of telescopes, with the other situated at South African Astronomical Observatory, Sutherland, South Africa.
It is the KELT North telescope at Sonoita, Arizona that has located two planets which are challenging to the current concepts of how worlds form within solar systems. The first planet is KELT-1b, and it is in orbit of KELT-1. This is a star situated within the constellation Andromeda (NOT the galaxy….). KELT-1b is described as a gas giant which is so massive that it could be called a “failed star”! It orbits KELT-1 at an incredibly rapid rate of a little more than one Earth-length day!
The second world, KELT-2Ab, was found within the constellation Auriga. This is situated some 360 light years away from us! It is a gas giant, akin to Jupiter. The planet orbits the main star of the HD 42176 binary system. It has been labeled as a hot Jupiter, which is a gas giant equivalent in size to our Jupiter, yet in orbit of it’s host star at an unusually, uncomfortably close distance.
An astronomy research team from Ohio State University is being given some credit for the discoveries of KELT-1b and KELT-2ab. They work with The American Astronomical Society, which held a convention in Anchorage, Alaska, yesterday. Their observations were made with a telescope that does not have the viewing capacity greater than a top-tier digital camera!
I am regularly fascinated, amazed, by all that is being discovered within various regions of outer space. There is just so much out there, as new worlds are being discovered nearly every day! Again, with all that is being found, and with so much more that has yet to be seen, it seems impossible, impractical, that our Earth is the only planet of it’s type within the universe, or even within our galaxy. It seems that it is just a matter of time before that another world with life is discovered. Maybe it has been already, and those “in charge” feel that the acknowledgement of it’s presence is a little bit too much for the general human psyche. Just a thought…..
SEE THESE SITES!!!