How common are mass extinctions?
Source:
According to biologists our planet has survived five . The reality is that more than 90 percent of all organisms that have ever lived on Earth are extinct. According to recent studies, the cycle length of 26 million years, linking the comet rains and the global extinction actually exists. Should we worry about it and not to make plans for the future?
What happened to the dinosaurs?
The Conditions on Earth at the time was, to put it mildly, so-so. Their disappearance gave rise to many theories suggesting that the ancestors of modern birds threw a giant comet, burned by lava, flooded with incredible size of the tsunami or that they simply suffered from the explosion of a supernova, and possibly even freeze during the ice age.
However, the ruling today, the theory of the dinosaurs States that 66 million years ago fell to Earth or a giant comet. And in its favor discovered new evidence — scientists have found that there is a relationship between the cyclical rain of comets and mass extinctions of wildlife.
Note to builders:
Michael Rampino, a geologist from new York University, and Ken Caldeira, a specialist in the study of the atmosphere of Science at the Carnegie Institute, traces the history of mass extinctions over 260 million years and found a familiar pattern: every 26 million years on the Earth fall of the comet, and then there is extinction.
Why there are rains of comets?
According to the theory Rampino and Caldeira, showers occur due to the fact that the planets of the solar system every 26 million years, pass through the middle of our galaxy. In the heart of the milky way is a lot of different cosmic bodies and dust. When the sun crosses this area, it destroys the huge clouds of cosmic dust. These clouds, in turn, knocked the comet's orbit, sending them to the Ground.
We often write about such things (scientists do not leave us without cause). Not to miss anything interesting, I advise you to follow it in .
When does the next rain of comets?
If Rampia and Caldeira right, following the rain of comets followed by a mass extinction not long to wait. At least for geologicheskom standards. Our little Solar system crossed the middle of the galaxy about 2 million years ago, and now we are moving again in the right direction.
Despite the fact that scientists cannot 100 percent predict the next comet or asteroid, it is believed that killed the dinosaurs heavenly body was at least prominent, even by the standards of a mass extinction.
What do you think, are there ways to protect our planet from the rain of comets and asteroids?
Recommended
The Americans on the moon: what everyone should know?
the Upcoming cosmonautics day is my favorite holiday. It marks the triumph of the human mind: in just four thousand years Homo Sapiens went from hunter-gatherers to space explorers. 12 April 1961 Soviet cosmonaut Yuri Gagarin became the first man in ...
Why are some galaxies spiral shaped?
you Know what surprised me the most? The fact that we perceive the surrounding world as it is. Animals, plants, the laws of physics and the cosmos are perceived by many people as something so mundane and boring that they invent fairies, ghosts, monst...
Astronomers were able to see the death of another star system
In the cosmic ocean drifts a lot of mysteries about the existence of which we are unaware. One of these was uncovered five years ago, when astronomers have discovered a lonely star at a distance of 570 light years from Earth, the brightness of which ...
Related News
Why on Mars not to withdraw the suit?
If ever you find yourself among the brave astronauts who went to colonize the Red planet, You should know one simple rule for survival on Mars: under any circumstances do not remove the suit! Even if you really want! due to the fa...
The impact of the asteroid created a tsunami destructive force on Mars
According to the Journal of Geophysical Research: Planets, an international team of scientists from France, Spain and Australia have come to the conclusion that about three billion years ago was under the influence of a powerful c...
In China are developing a reusable rocket, like SpaceX. It is capable of?
did you Know that every launch of a space rocket aerospace is costing companies at least $ 60 million? In order to reduce their cost, in 2013, the company SpaceX was thinking about — at the moment she has already established re-us...
Mysterious radio signals from deep space will help to decipher artificial intelligence
our planet continues to receive different radio signals. More than once scholars have attempted to decipher them and understand whether they have at least some sense. However, regular attempts to do this over and over again fail a...
Rocket Lab is going to catch their missiles with a helicopter. How do you like Elon Musk?
a Private us aerospace company Rocket Lab has said that it intends during the year to develop the method for safe return to Earth worked first stages of its missiles Electron for . If she happens to realize this idea, it will beco...
Israeli lunar module was able to bring the moon beings
We often write on our website about the different countries. Not so long ago, for example, we reported on the launch of the space module "Bereshit" private Israeli company, Space IL. The device was sent to the moon and had to make...
Flies to the Earth a huge asteroid the size of a skyscraper
According to the American space Agency NASA, at the end of this week, on Saturday August 10 with a speed of 16 772 kilometers per hour to our planet will approach a very large asteroid. Scientists say that the object having the na...
Scientists have learned how on the frozen planets that might have life
When searching for planets that could Harbor life outside our Solar system, scientists generally pay great attention to planets like Earth. There is a certain logic, because if our planet were able to , that is, the probability of...
NASA along with SpaceX will create a fueling station in Earth orbit
the U.S. announced the beginning of cooperation with ten new companies, with whom they will develop new space technologies. Perhaps the most interesting among these agreements is the cooperation of NASA with private space company ...
France plans to send into space combat lasers. Why?
In the 80-ies of the last century there was a program that was done at that time, a lot of noise. It was called the Strategic defense initiative (SDI) and to create a missile defense system, which would be co-located in space. Som...
#video | What is the difference between earthquakes, lootrisone and marsotryaseniya?
the material about visible from space , we mentioned about the sweltering heat that overtook the inhabitants of European countries. However, summer 2019 unpleasantly surprised and people in the US — in early July in the state of C...
What will the Mars Rover "Mars-2020" with his hands?
the Space Agency NASA has long been trying to find on Mars signs of life. I think she already does not matter, it exists now or have ruled the planet millions of years ago, because even the detection of barely visible trac...
SpaceX conducted a successful test of a prototype spacecraft for missions to Mars
Today, the main star for a private space company SpaceX are launch vehicles, the Falcon 9 and Falcon Heavy. They are used by the company for a conclusion of satellites and delivering cargo to the International space station. Howev...
Can the microbes to do mining on Mars?
minerals are very rare in pure form and in most cases imprisoned inside a variety of rocks. For many centuries people have engaged in their extraction manually, but then found out that the microbes to cope with this task much bett...
Scientists think that the moon has much more water than previously thought. Flights to Mars to be!
today there are hardly any doubts that may have reserves of water in form of ice. In particular, water may be in the craters of the South pole of the moon from the fact that they are constantly in the shade. However, a group of re...
A prototype of the spacecraft company SpaceX lit up again during testing
At SpaceX, owned by billionaire Elon musk, it's a problem. Scheduled for today testing an experimental spacecraft Starhopper again failed. The prototype vehicle had to rise to the height of 20 meters, but after the engine caught f...
Above Ground opened a huge solar sail LightSail 2
Right now orbiting the Earth works a thousand artificial satellites each of which travels through expensive ion engines with a lifespan of not more than three years. If these engines are so expensive and short-lived, why haven't s...
The original video of the landing of "Apollo-11" to the moon was sold for almost $ 2 million
While the rest of the indifferent world celebrated the 50th anniversary of the first landing on the moon, and we discussed why the moon race America, Sambisa – one of the world's oldest auction houses – was auctioned off three ori...
What is common between us trainer for landing on the moon and Soviet Turboatom 1955
the Possibility of landing a man on the moon July 20, 1969 was the result of colossal work a huge number of people and the attachment is fabulous for the days of the 60-ies of the last century money. Ambitious mission required an ...
India launched to the moon Rover in the mission "Chandrayaan-2"
launched its most ambitious space mission. With the help of the carrier rocket GSLV MK-III weight of 640 tons the moon went interplanetary space station "Chandrayaan-2". This launch was to be held on July 15th, however due to unn...
Comments (0)
This article has no comment, be the first!