Homehttps://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/Sciencehttps://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/A massive asteroid collision once caused the Earth to cool down and enter an ice age. Can we repeat it?
A massive asteroid collision once caused the Earth to cool down and enter an ice age. Can we repeat it?
The evolution of life on Earth is sometimes dependent on astronomical events. We know this from the case of dinosaurs that have been destroyed A 1
0-kilometer asteroid or comet struck The Yucatan Peninsula in Mexico about 66 million years ago.
However, scientists have only now discovered that a major ice age many millions of years ago was caused by a collision of asteroids in the solar system.
Can this unexpected finding help to address global warming? L-chondritis par ent body ”, published in Science Advances, by researchers at Field Field in Chicago, Lund University in Sweden and others, claim that the collapse of a major asteroid 466 million years ago filled the entire internal solar system with og Roma dust quantities leading to the Ice Age. & nbsp;
How big was the asteroid?
The calculations put the asteroid in question about 93 miles wide. However, instead of hitting Earth, this asteroid simply split into the asteroid belt between Mars and Jupiter and created much more dust than usual in the internal solar system. This is the largest documented disintegration in the last three billion years, and its disintegration still accounts for nearly a third of all meteorites that have fallen on Earth today, according to the document.
What is cosmic dust?
Earth always has cosmic dust in its atmosphere, as well as dust from volcanoes, deserts and sea salt. In the current stratosphere, extraterrestrial dust represents 1% of all dust and is not of climatic importance. "Typically, the Earth accumulates about 40,000 tons of alien material each year," says Philip Heck, a curator at the Field Museum, an associate professor at the University of Chicago and one of the paper's authors. "Our hypothesis is that large amounts of alien dust over a period of at least two million years have played an important role in changing Earth's climate, contributing to cooling," says Heck.
How does cosmic dust cool the Earth's climate? & Nbsp  Essentially, by blocking the light of the Sun, it is already known that the Earth's climate cooled 466 million years ago, but how exactly the "Ordovician Ice Houses" were triggered or intensified so far is a mystery. the dust partially stopped the sun "It is analogous to standing in the middle of your living room and smashing a vacuum cleaner bag on a much larger scale," says Birger Schmitz, professor of geology at the University of Lund. "Our results show for the first time that such dust has sometimes cooled the Earth dramatically."
How cosmic dust increases Earth's biodiversity & nbsp;
The arrival of all the cosmic dust has happened so gradually – in fact, for at least two million years – life has been able to adapt to changing temperatures, leading to the explosion of new species. This is called " The Great Ordovician Biodiversity Event ".