Our Solar System Is Alive: The Explosive Story Of ‘Space Volcanoes’ On 9 Close Worlds Of ‘Fire And Ice’ - Forbes | Canada News Media
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Our Solar System Is Alive: The Explosive Story Of ‘Space Volcanoes’ On 9 Close Worlds Of ‘Fire And Ice’ – Forbes

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First it was Fagradalsfjall in Iceland. Now Cumbre Vieja is erupting in La Palma in the Canary Islands.

2021 has so far been an explosive year on our planet, but it’s not the only place in the Solar System where volcanoes have been making the news.

This week moon rocks returned to Earth on China’s Chang’e-5 mission revealed that the Moon was volcanically active a billion years more recently than previously thought. Last month scientists found evidence that Arabia Terra in northern Mars experienced thousands of “super eruptions” during a 500 million year period that could have changed the red planet’s climate.

Neither the Moon nor Mars are geologically active anymore, but there are plenty of places where “space volcanoes” can be found … though they’re not quite what you may expect. 

“Our view of volcanoes is very much biased towards how they look on Earth—a conical shaped mountain, often with a snowy peak that erupts some kind of molten hot rock,” said Natalie Starkey, a geologist and cosmochemist and author of “Fire and Ice: The Volcanoes of the Solar System,” which published last week. “It was only from NASA’s Voyager missions that we found out that there were volcanic worlds elsewhere, but those volcanoes don’t look like those on Earth.” Starkey’s excellent book is the first to examine these extra-terrestrial volcanoes of our Solar System.

It’s an explosive read in more ways than one.

“There are some that are similar to Earth’s volcanoes in the inner Solar System—such as volcanoes on Venus and the 15 miles/25 kilometres high Olympus Mons on Mars, which looks very much like Mauna Kea in Hawaii,” said Starkey. “When we get to the icy moons we find volcanic behaviour, but not necessarily conical-shaped mountains.” 

Volcanoes are a part of the efforts a planetary body makes to cool itself down, releasing excess heat into space. For geologists it’s instant evidence that a world is active. “The same thing happens even on icy worlds—they’re still warmer on the inside than on the outside and that heat wants to move,” said Starkey. “So it only takes a slight temperature change to turn frozen water, methane or ammonia into a liquid.” So on an icy world it’s liquid water/ammonia/methane rather than liquid rock that spews out of a warm core. 

Yes, space volcanoes are pretty weird—and they get even weirder.

Here’s where you’ll find them in the Solar System—and they’re not where you think they are: 

Venus: second planet from the Sun

Venus is the new Mars, with five missions due to visit in the next decade. But should it be on this list? “We don’t have any proper proof that it’s still erupting today,” said Starkey. “But there’s a lot of evidence to suggest that it does have active volcanoes on its surface.”

The weird thing about Venus is that its surface is all the same age—about 500 million years old—largely because it doesn’t have plate tectonics, as we have on Earth. “It’s got a similar amount of heat to lose as Earth because it’s about the same size, so it builds up and then there’s a huge event where all that heat is released over a few hundred million years,” said Starkey.

There are probably about 37 volcanoes that could still be active and may have erupted lava and gases recently, but the atmosphere is hard to see through—hence the bevy of imminent exploration missions, like DAVINCI+, which will include a lander. 

Io: moon of Jupiter

The most volcanically active world in the Solar System, Io is the innermost Galilean moon of Jupiter and thought to be home to an underground ocean of magma. “It’s got a constant heat source because of the tidal heating from Jupiter,” said Starkey. Io is in a constant gravitational tug-of-war with Jupiter and the other big moons, so much so that it changes shape during its 42-hour orbit.

It’s that constant friction and energy that makes Io so hot—and therefore so volcanic—so much so that an ocean of magma exists beneath its surface. Io features eruptions many orders of magnitude bigger than what happens on Earth today. “It should continue being so volcanic for as long as it is next to Jupiter and the other Galilean moons.” 

Europa: moon of Jupiter

Europa—the fourth largest of Jupiter’s 79 moons—has fractures in its icy surface that make it look like a “veiny eyeball.” That’s a clue to its volcanism. “Europa is almost certainly volcanically active,” said Starkey. “The easiest way to tell is its surface—if it’s covered by craters that indicates that it’s not been resurfaced.” There are a few crater visible on Europe, but not many. “It’s geologically interesting do it must have been active recently,” she said.  

Enceladus: moon of Saturn

“Enceladus has a hot rocky core, just like Earth, but it’s got huge ocean of salty water that’s capped with ice,” said Starkey. That ice cap is, effectively, its crust, which salty water erupts through from the ocean underneath as geysers—but not like those found on Earth, which are related to volcanic activity, but are not produced by a volcano.

“On Enceladus, these geysers or plumes are literally that body’s magma coming out of the inside,” said Starkey.  

Titan: moon of Saturn

Saturn’s largest moon has rain and flash floods, lakes and oceans, an atmosphere and humidity. It’s got ice comprised not of water, but of liquid ethane and methane. Titan is the most similar place in the Solar System to Earth despite its chemistry being very different. But volcanoes?

“It’s definitely got volcanoes, which are probably releasing methane, and it could also have a subsurface ocean where heat meets salty water,” said Starkey. Microbes? It’s possible. “That’s exactly how we think life started on Earth,” said Starkey. “Titan is certainly an active world—and that’s what we’re looking for.”  

Miranda and Titania: moons of Uranus

The smallest and innermost of Uranus and the the eighth largest moon in the Solar System, respectively, are something of a volcanic enigma. Miranda was passed by NASA’s Voyager 2 spacecraft in 1986. “These two look like evil worlds from a sci-fi movie, but they’re very geologically interesting,” said Starkey. “We don’t know much about these icy worlds and we need to go back.” 

Miranda (which has a canyon 12 miles deep) is about half ice and half rock, with terraced layers that indicate both older and new surfaces coexisting. One theory is that partly melted ice is forced upwards to create new surfaces. Titania also has canyons and there’s some evidence for both tectonic activity and ice volcanoes. 

It’s reckoned that Miranda, Titania and three other moons of Uranus—Ariel, Umbriel and Oberon—could have, or did have, liquid water below their icy surfaces. 

Triton: moon of Neptune

“Triton was the first outer Solar System world that we found to be cryo-volcanically active,” said Starkey. Most of what we know about Triton came from a flyby in 1089 by Voyager 2, the spacecraft’s final target in its mission. “We saw streaks and plumes across the surface that looks like little fires burning—some kind of plume or volcanic activity but we have a lot of questions about Triton,” said Starkey. “It’s probably a captured moon and it’s probably being pulled and pushed about by Neptune.” Cue tidal heating as found on Io at Jupiter … but with an ocean, too.

Triton was identified as the highest priority candidate ocean world in January’s paper “The NASA Roadmap to Ocean Worlds”. 

Pluto: dwarf planet in the Kuiper Belt

Triton is known as Pluto’s twin, so it’s no surprise that everyone’s favourite ex-planet may also be home to cry-volcanic activity. How do we know? New Horizons’ flyby in 2015 showed us a smooth surface with no craters and detected ammonia, which lowers the temperature that ice water melts and creates a sludge—a kind of lava.

It also found what could be an ice volcano called Wright Mons, which could be the largest volcano discovered in the outer Solar System. It’s home to only one impact crater.

Wishing you clear skies and wide eyes. 

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Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

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More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

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Follow AP’s climate coverage at https://apnews.com/hub/climate

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Follow Seth Borenstein on Twitter at @borenbears

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Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

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‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

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It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

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The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

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TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

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