As volcanic eruptions and earthquakes occasionally remind us, the earth beneath our feet is constantly on the move.
Continental plates only move around one to four inches per year, so we don’t notice the tectonic forces that are continually reshaping the surface of our planet. But on a long-enough timeline, those inches add up to big changes in the way landmasses on Earth are configured.
Today’s map, by Massimo Pietrobon, looks back to when all land on the planet was arranged into a supercontinent called Pangea. Pietrobon’s map is unique in that it overlays the approximate borders of present countries to help us understand how Pangea broke apart to form the world that we know today.
Pangea: The world as one
Pangea was the latest in a line of supercontinents in Earth’s history.
Pangea began developing over 300 million years ago, eventually making up one-third of the earth’s surface. The remainder of the planet was an enormous ocean known as Panthalassa.
As time goes by, scientists are beginning to piece together more information on the climate and patterns of life on the supercontinent. Similar to parts of Central Asia today, the centre of the landmass is thought to have been arid and inhospitable, with temperatures reaching 113°F (45°C). The extreme temperatures revealed by climate simulations are supported by the fact that very few fossils are found in the modern day regions that once existed in the middle of Pangea. The strong contrast between the Pangea supercontinent and Panthalassa is believed to have triggered intense cross-equatorial monsoons.
By this unique point in history, plants and animals had spread across the landmass, and animals (such as dinosaurs) were able to wander freely across the entire expanse of Pangea.
Breaking up is hard to do
Around 200 million years ago, magma began to swell up through a weakness in the earth’s crust, creating the volcanic rift zone that would eventually cleave the supercontinent into pieces. Over time, this rift zone would become the Atlantic Ocean. The most visible evidence of this split is in the similar shape of the coastlines of modern-day Brazil and West Africa.
Present-day North America broke away from Europe and Africa and, as the map highlights, Atlantic Canada was once connected to Spain and Morocco.
The concept of plate tectonics is behind some of modern Earth’s most striking features. The Himalayas, for example, were formed after the Indian subcontinent broke off the eastern side of Africa and crashed directly into Asia. Many of the world’s tallest mountains were formed by this process of plate convergence—a process that, as far as we know, is unique to Earth.
What the very distant future holds
Since the average continent is only moving about one foot (0.3 metres) every decade, it’s unlikely you’ll live to see an epic geographical revision to the world map.
However, for whatever life exists on Earth roughly 300 million years in the future, it may have front row seats in seeing the emergence of a new supercontinent: Pangea Proxima.
As the above video from the Paleomap Project shows, Pangea Proxima is just one possible supercontinent configuration that occurs in which Australia slams into Indonesia, and North and South America crash into Africa and Antarctica, respectively.
Interestingly, Pangea Proxima could have a massive inland sea, mainly made up of what is the Indian Ocean today. Meanwhile, the other oceans would combine into one super-ocean that would take up the majority of the earth’s surface.
Posted with permission of Visual Capitalist.
Mother mystified by Winnipeg toddler's 'terrifying' condition after coming down with COVID-19 – Yahoo News Canada
Doctors are investigating the case of a Winnipeg toddler with symptoms suggesting a rare, inflammatory illness potentially linked to COVID-19, the girl’s mother says.
The 21-month-old child is fighting to recover, even after she no longer tested positive for COVID-19.
The mother says health-care providers treating her daughter are concerned the girl may have developed Kawasaki disease, which is also known as multi-system inflammatory syndrome (MIS-C) in children.
Inflammatory syndromes can result from the body’s reaction to new viruses — not just the new coronavirus. But doctors in Canada, and scientists around the world, are investigating for a link to COVID-19.
Public health officials say no cases of the conditions connected with COVID-19 have been confirmed in Manitoba so far.
“Honestly, it’s just terrifying … Doctors don’t have the answers,” said the girl’s mother, who CBC is not naming due to concern about stigma.
The toddler’s parents didn’t know what to make of the her symptoms. She had a red, puffy rash, vomiting and diarrhea, a tender abdomen and a recurring fever that spiked to 38.9 C (102 F).
“She refused to eat, barely had anything to drink,” said her mother.
Pediatricians they contacted were cautious about sending the child to a hospital, and told the mother to try Tylenol, thinking the girl had a flu.
On April 28, two days after the girl’s symptoms arose, the family learned the husband has been exposed to a co-worker who later tested positive for COVID-19.
They went for testing immediately, and blood work confirmed the toddler had COVID-19, the mother said.
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="WATCH | Toronto doctor answers questions about inflammatory syndrome following COVID-19” data-reactid=”34″>WATCH | Toronto doctor answers questions about inflammatory syndrome following COVID-19
At that point, Manitoba had fewer than 25 active cases of the disease and was announcing plans for reopening.
“It was absolutely devastating,” the mother said. “How could it possibly be COVID … with the cases being so low?”
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content="‘More unknowns than knowns’” data-reactid=”37″>‘More unknowns than knowns’
A provincial spokesperson said since Kawasaki disease isn’t required to be reported in Manitoba, officials can’t confirm investigations into the illness in Manitoba.
The spokesperson said Manitoba pediatric infectious disease experts are in constant communication with specialists in Ontario and Quebec.
Hospitals in Ontario, Quebec, B.C. and Alberta are examining possible cases of MIS-C. Experts say the illness is difficult to diagnose and cases remain ill defined.
“There are way more unknowns than knowns,” said Rae Yeung, a professor of pediatrics, immunology and medical sciences at the University of Toronto, and staff pediatrician and rheumatologist at the Hospital for Sick Children.
<p class="canvas-atom canvas-text Mb(1.0em) Mb(0)–sm Mt(0.8em)–sm" type="text" content=""Right now, the big challenge is that there is not one diagnostic test … that can actually tell us whether a child has MIS-C or Kawasaki disease, [which are] all one hyper-inflammatory syndrome," said Yeung.” data-reactid=”42″>”Right now, the big challenge is that there is not one diagnostic test … that can actually tell us whether a child has MIS-C or Kawasaki disease, [which are] all one hyper-inflammatory syndrome,” said Yeung.
“As we’re learning, the one common denominator is that they have massive immune activation. But many things can cause massive immune activation.”
When she’s not sick, the child in Winnipeg is “very chatty. She’s energetic, running around,” said her mother.
COVID-19 sucked that energy away as the toddler mostly slept.
Eventually, “she was only awake approximately three hours in a 24-hour period,” her mother said.
After she tested positive, doctors admitted the toddler to the hospital for treatment and testing to rule out anything else that may have been making her sicker.
Initially, doctors hoped her body could fight off the disease on its own, her mother said. But the family has been in and out of the hospital for weeks as her condition remained serious.
Last week, the toddler’s health took a turn for the worse. But on May 28, tests showed she’s now negative for COVID-19 and is fighting a new medical battle.
Doctors then raised the possibility of MIS-C or Kawasaki, the mother said, and will now begin further tests to help understand exactly what is making her daughter so ill.
“You just kind of feel helpless because you can’t make [your children] feel better,” she said.
“You don’t want to see them sick, especially with something so serious as a pandemic. You just wish you could take their pain away.”
Yeung calls MIS-C “the syndrome with many different names,” because depending on where you are in the world, it might be called different things.
“I think this is part of the reason why it’s led to some confusion and a lot of anxiety, in fact, among not only families, but also caregivers and health-care professionals,” she said.
Much of what’s known about the disease remains hypothetical, she said, and research is needed to understand more. At its core, the syndrome can be characterized by inflammation, especially in blood vessels, caused by a hyperactivation of the immune system.
“What we’re seeing in all of these syndromes is hyper inflammation — just an overactive immune system that’s gone into overdrive, affecting multiple organs in the body,” she said.
The illnesses in that family are triggered by a “tickle” to the immune system, Yeung said, starting with anything from strep throat to the novel coronavirus. Canada documents roughly 100 to 150 cases of Kawasaki disease a year, she said.
But epidemiology in Europe, the U.S. and Canada has suggested a pattern, as cases of inflammatory syndromes in children emerge roughly four to six weeks following the peak coronavirus outbreak in each population.
Many, even most, of the children diagnosed with these illnesses don’t initially test positive when swabbed for COVID-19, Yeung said, but blood work often shows the children had the disease previously.
It’s still not clear exactly how many cases of the inflammatory illness there are in Canada, Yeung said. She said at Toronto’s Hospital for Sick Children, they’re seeing roughly three to four times the volume of these illnesses over normal years.
Yeung is helping lead research, in partnership with the Canadian Paediatric Society and the Public Health Agency of Canada, with doctors across the country to determine where cases are and help understand them better.
“I think sharing knowledge and alerting the public is a very important component of this,” Yeung said.
The mother of the Winnipeg toddler said she wanted to share her story to spread information and urge caution from parents.
“It’s rare, but it’s serious,” the mother said. “If you’re in doubt, take your child to the hospital.”
Scenes of SpaceX launching NASA astronauts into orbit, moment by moment – CNET
SpaceX’s Crew Dragon spacecraft, perched atop the company’s Falcon 9 rocket, takes off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida, carrying NASA astronauts Robert Behnken and Douglas Hurley to the International Space Station. The May 30 launch was the first US rocket launch with a crew since the Space Shuttle program ended in 2011 and SpaceX’s first crewed mission ever. The mission is called Demo-2 since its primary purpose is to test out SpaceX’s spacecraft.
An Asteroid Bigger Than The Empire State Building Poses ‘No Danger’ On Saturday Night, Says NASA – Forbes
A huge near-Earth asteroid will pass our planet tonight at a safe distance of 3.2 million miles, according to NASA.
After a spate of doom-laden headlines the space agency felt the need yesterday to update a previous post about near-Earth asteroids with the following note:
“Asteroid 2002 NN4 will safely pass by the Earth on June 6 at a distance of approximately 3.2 million miles (5.1 million kilometers), about 13 times further away from the Earth than the Moon is. There is no danger the asteroid will hit the Earth.”
Asteroid 2002 NN4’s closest approach to Earth will be at 11:20 p.m. EDT. on Saturday, June 6, 2020.
NASA also tweeted the same advice:
NASA Asteroid Watch then tweeted this image of the asteroid’s trajectory:
How big is Asteroid 2002 NN4?
Asteroid 2002 NN4 is huge. Measuring between 820 feet and 1,870 feet (250 meters to 570 meters) according to Space.com. New York City’s Empire State Building is 443.2 meters tall, including its antenna.
That’s over a dozen times bigger than the asteroid that exploded over Chelyabinsk, Russia, in 2013. That was the biggest meteor for over a century.
Would asteroid 2002 NN4 be dangerous if it hit Earth?
Yes—asteroid 2002 NN4 is city-killer size, but it’s not going to cause any harm to anyone.
Wishing you clear skies and wide eyes.
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