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Hidden Crater Under Greenland May Explain Sudden Climate Change

Hidden Crater Under Greenland May Explain Sudden Climate Change 90

Those looking to bolster their argument that not all climate change is manmade may have received an early Christmas gift – researchers have found a massive hidden asteroid impact crate under Greenland whose age coincides with the beginning of a previously unexplained cooling period about 12.000 years ago. Does this change everything?

“The crater is exceptionally well-preserved, and that is surprising, because glacier ice is an incredibly efficient erosive agent that would have quickly removed traces of the impact. But that means the crater must be rather young from a geological perspective.”

In a press release announcing the study “A large impact crater beneath Hiawatha Glacier in northwest Greenland” published in the current edition of Science Advances, co-author Professor Kurt H. Kjær from the Center for GeoGenetics at the Natural History Museum of Denmark describes how researchers first found signs pointing to the existence of the crater under Greenland’s ice sheet in July 2015. It was not far from where a 20-ton iron meteorite had been discovered, but that wasn’t enough to connect the dots.

Hidden Crater Under Greenland May Explain Sudden Climate Change 91

Is any part of Greenland not covered by glaciers?

A German research plane from the Alfred Wegener Institute flew over the Hiawatha Glacier and, using a new ice radar system, was able to better image the depression and added to the evidence, exciting NASA glaciologist Joseph MacGregor. (Pictures here.)

“A distinctly circular rim, central uplift, disturbed and undisturbed ice layering, and basal debris. It’s all there.”

Surface expeditions in 2016 and 2017 collected samples of sediment washed out from under the depression and found the missing link.

“Some of the quartz sand washed from the crater had planar deformation features indicative of a violent impact, and this is conclusive evidence that the depression beneath the Hiawatha Glacier is a meteorite crater.”

The crater measures more than 31 km (19.25 miles) in diameter, which puts the size of the iron meteorite at 1 km (.6 miles) wide and puts the impact in the top 25 of Earth impact craters, making it a good candidate for causing ecological disasters. Ice layers show it’s at least 12000 years old and rock erosion samples say it’s no more than 3 million years old.

It’s the more recent date that has scientists linking the event to the Younger Dryas period – a sudden unexplained cooling during a time of global warming after the last ice age. Occurring about 12,900 to 11,700 years ago, geological records in the Northern Hemisphere indicate a swift drop in temperatures of 2 to 6 degrees Celsius (3.6 to 10.8 degrees Fahrenheit), increases in glacier ice and cold waters in the Atlantic and general drier conditions. While the cooling was widespread, a few areas, southeastern North America for one, had a slight warming. The Younger Dryas coincided with a number of human cultures shifting from hunting and nomadic life to agriculture and settlements. In North America, the Clovis culture declined and a number of animal species went extinct.

Hidden Crater Under Greenland May Explain Sudden Climate Change 92

All of these things could certainly have been caused by a meteor impact of catastrophic size. Is that the answer to the cause of the Younger Dryas that scientists have been searching for?

“The next step in the investigation will be to confidently date the impact. This will be a challenge, because it will probably require recovering material that melted during the impact from the bottom of the structure, but this is crucial if we are to understand how the Hiawatha impact affected life on Earth.”

Sounds like Kjær is making his plans for next summer. Pack a parka, professor!

SOURCE: Mysterious Universe

Planet Earth

A strange phenomenon in the Arctic, the cause of which is unknown

A strange phenomenon in the Arctic, the cause of which is unknown 105

In 2018, a plane flying over the Greenland glaciers noticed strange holes in the ice. NASA scientists cannot yet find the reason for their appearance.

The Arctic is a mysterious place, and as the Earth’s climate changes, it changes faster than scientists can record. So, according to NASA, strange holes began to appear in the ice, and so far no one can understand what causes them. 

The photo was taken by John Sonntag, a scientist working for NASA’s IceBridge operation, an ambitious mission to capture as much detail as possible of the North and South Poles in hopes of figuring out what is happening right now in these remote parts of the planet.

Unfortunately, this photo raises more questions than answers, at least for now. But even though scientists from IceBridge do not have an exact answer to what these holes are, they make assumptions. / These holes may be caused by ice melting due to the water warming under the ice, or they may be air pockets caused by whales or seals. However, for the latter variant the holes are somehow too big. 

NASA even asked its readers on the Internet for advice on what it might be. There were many assumptions, but it is not yet possible to say exactly why these holes formed.

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Planet Earth

Rich people from all over the world are buying submarines

Rich people from all over the world are buying submarines 106
Photo: uboatworx / YouTube

The wealthy around the world will spend millions of dollars on private submarines, following Russian billionaire Roman Abramovich, The Times reports.

According to the publication, in the period from 2019 to 2020, it was about the sale of 15 to 25 submarines, however, this number is expected to double in 2021. According to representatives of the three leading submarine manufacturing companies, next year the market will be estimated at 75 million pounds.

Among the first buyers of deep-sea vessels were the owner of Chelsea Football Club Roman Abramovich, the late Microsoft founder Paul Allen and the Emir of Abu Dhabi, Sheikh Khalifa Al Nahyan.

Roy Heijdra of the Dutch company U-Boat Worx noted that wealthy people increasingly want their yachts to be specially equipped for exploration, not just luxury holidays. According to him, ten vessels were sold in 2020 worth up to £ 2.2 million each. Among them was the Nemo model, which is estimated at 875 thousand pounds, has a height of 2.8 meters and can dive to a depth of more than 90 meters with two people on board.

In turn, the executive director of the Florida company Triton, Bruce Jones, said that compared with the previous year sales of submarines this year rose by almost a third, despite the pandemic coronavirus. At the moment, he has about five orders that need to be completed by the beginning of 2021.

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Planet Earth

A prehistoric forest that grew on earth a million years ago was found on the slope of Kilimanjaro

A prehistoric forest that grew on earth a million years ago was found on the slope of Kilimanjaro 107
Photo: earthlymission.com

Just 300 kilometers south of the equator is the highest point in Africa, the potentially active stratovolcano Kilimanjaro, which covers an area of ​​more than 390 hectares. But as a free-standing mountain, the climatic zones of which become less and less like a terrestrial landscape as it rises, Kilimanjaro is especially notable as an incubator for isolated, mutated or rare species that are almost never found anywhere else. 

Recently, on one of the slopes, scientists discovered plants of a prehistoric forest. They grew on Earth a million years ago.

A prehistoric forest that grew on earth a million years ago was found on the slope of Kilimanjaro 108
earthlymission.com

Senecio kilimanjari is a giant plant. It has practically not changed over the past million years, dinosaurs once roamed in the same forests. The territory of the giant groundwort begins at an altitude of 3000 meters. There is less rainfall and therefore the prehistoric forest is not so dense. This only further emphasizes the monumentality of the giant plants standing separately from each other, capable of growing up to 5-7 meters.

A prehistoric forest that grew on earth a million years ago was found on the slope of Kilimanjaro 109
earthlymission.com

To survive in such a harsh environment – high in the mountains, temperatures regularly drop below zero during the night – the plants have developed water accumulation in the core of the stem, the movement of nyctinous leaves (which means that the leaves close when the temperature drops too much), natural ‘antifreeze “And self-isolation due to wilted and dead foliage (one of the reasons terrestrial plants look so strange).

A prehistoric forest that grew on earth a million years ago was found on the slope of Kilimanjaro 110
earthlymission.com

The prehistoric forest rises to about 4,300 meters. Above the slopes of Kilimanjaro, only a barren alpine desert begins, ending in a colossal glacier at the very top of the stratovolcano.

A prehistoric forest that grew on earth a million years ago was found on the slope of Kilimanjaro 111
earthlymission.com

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