Mass extinction 252 million years ago coincided with an increase in carbon dioxide

Mass extinction 252 million years ago coincided with an increase in carbon dioxide Facts

Presumably the first living organisms appeared 3.8 billion years ago. Over the past 500 million years on Earth happened five mass extinctions. Scientists agree that dinosaurs may have become extinct 66 million years ago with the fall of a huge asteroid. Greatest mass extinction, during which lost some 90% of marine and terrestrial species, occurred at the end of the Permian period 250 million years ago. But the reason has not yet been established.

Researchers at MIT have come to two conclusions about the mass extinction.

Continue reading Mass extinction 252 million years ago coincided with an increase in carbon dioxide

Asteroids — SERIAL KILLER?

02.12.2003

 

02.12.03, the

—>

Catastrophic asteroid collision with Earth ahead of several large-scale volcanic eruptions in the fight for the title of the biggest killers of life on Earth. The breakthrough led to the re-surfaced two things: a collision that occurred 250 and 65 million years ago. The first mass extinction occurred at the boundary of the Triassic and Permian geological periods — then, according to fossil evidence, had died more than 90% of marine life

Continue reading Asteroids — SERIAL KILLER?

Earth is closer to the next mass extinction of life

Forecast

03.04.11. American scientists claim that humanity is approaching a massive extinction of all life, as tens of millions of years ago, when the Earth with dinosaurs disappeared. According to the authors, the results of which were published in the journal Nature, if we do not take action, the deleterious effects of human activities on ecosystems will have for several centuries to a full 75% of the extinction of all life on our planet. Restoration of life after such an event of apocalyptic scale delayed for millions of years.

To such a disappointing conclusion the American scientists led by Professor

Continue reading Earth is closer to the next mass extinction of life

Scientists have discovered the symbols engraved 1.2 million years ago

17.03.2004

17.03.2004

—>

The cave Kozarnika in northwestern Bulgaria French scientists have discovered an ancient animal bone engraved with symbols on it. This finding may be the most ancient material evidence of the ability of our ancestors to the artistic generalization.

The discovery made by anthropologists from the Institute of

Continue reading Scientists have discovered the symbols engraved 1.2 million years ago

USA: butterfly ancient than they seem?

23.03.2004

23.03.2004

—>

Butterflies can be much more ancient creatures than people think — it's a new study fossil specimens, perfectly preserved in amber. The earliest known butterfly fossils paleontologists have an age of 40-50 million years old. But an analysis of five unique pieces of amber suggests that butterflies

Continue reading USA: butterfly ancient than they seem?

How did the Globe. The birth and death of the first continent

26.03.2004

26.03.2004

—>

750 million years ago, glaciers reached the equator

Christian Galya, Le Monde

Geologists have long been intrigued by the presence of traces of very ancient glaciers in many parts of the world, including at the equator. What is their age? From 800 to 550 million years —

Continue reading How did the Globe. The birth and death of the first continent

The team of geologists determine the age of the Tibetan Plateau

An international team of geologists studying the mountain ranges along the eastern edge of the Tibetan Plateau said the strong growth of the relief in Sichuan (China), started much earlier than previously thought, until recently, reports «SciencePlanet.ru».

Indian tectonic plate collided with Asia about 55 million years ago, but "impressive topographic relief lies against the Sichuan Basin before the Indo-Asian collision," — the researchers report in the online journal «Nature Geoscience».

"Most researchers believe that the high relief in eastern Tibet was formed during the last 10 to 15 million years, when the deep crust of the central Tibetan

Continue reading The team of geologists determine the age of the Tibetan Plateau

One for all the mega-continent

April 24, 2012 9:26

You never were concerned about how it will look from space Earth in a few hundred million years?

Geologists believe that billions of years ago the continents disconnected again "eager" to meet, to unite and form a common, but a vast continent, Pangea Supernova.

This continent is, of course, will be polar, which is not particularly good for our very distant descendants, but how do we know who will be at that time living in our beloved planet.

If you believe the conclusions of scientists, similar supercontinent existed on the planet and a very, very

Continue reading One for all the mega-continent

Oceans then cooled, then heated

Two million years ago the temperature the Indian and Pacific oceans has changed

Two million years ago to replace the forests in East Africa came pastures, and the number of species living there markedly increased, appeared the conditions for the emergence of the ancestors of antelopes and horses. Why? With so much influence on the climate? This question puzzled researchers from Columbia University (USA). And Professor Peter Demenokalyu probably find the answer.

In his view, were the cause of variations in ocean temperatures along the equator. They determine the present situation for precipitation. In the west equatorial Pacific

Continue reading Oceans then cooled, then heated

There was some evidence of ancient lithospheric plate gap in the north-western U.S.

Ancient giant eruption in the north-western United States could in fact be caused by rupture of the earth's crust.

Evidence of active volcanism in Yellowstone National Park is the valley of the Columbia River basalts. Lava covered a large area. For about two million years has been regurgitated over 230 thousand miles? molten rock. Typically, these traps are formed when the top of a giant mantle plume (mushroom vertical flow of magma that rises from the depths of the earth) reaches the surface. In this case, however, the cause could be elsewhere.

Scientists conducted a computer simulation of the complex

Continue reading There was some evidence of ancient lithospheric plate gap in the north-western U.S.

SQL - 16 | 1,330 сек. | 7.39 МБ