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Fresh meteorite impact craters discovered on Mars – Innovation News Network

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Researchers from Curtin University have helped discover the largest fresh meteorite impact craters on Mars since NASA’s Mars Reconnaissance Orbiter began scouring the planet for them 16 years ago.

On 24 December 2021, NASA’s InSight Lander recorded a magnitude five marsquake, which was recently discovered to be caused by a meteorite strike. One of the meteorites excavated contained ice at the lowest altitude ever observed on the planet, an important discovery for NASA’s future exploration plans.  

The discovery was assisted by two Curtin University scientists, the only two Australian representatives on the NASA-led international research team. The research, titled ‘Largest recent impact craters on Mars: Orbital imaging and surface seismic co-investigation,’ was published in the journal Science. 

Discovering the craters with NASA’s technology  

The meteorite is estimated to have spanned 16-39 feet, making way for the rare discovery of two impact craters, both larger than 130 meters in diameter each. The craters, believed to be among the largest craters ever witnessed forming in the solar system, were detected using NASA’s imaging technology and seismometers. Larger crates exist on Mars, but these predate any mission to the planet. 

Research co-author Associate Professor Katarina Miljkovic, from Curtin’s Space Science and Technology Centre and the School of Earth and Planetary Sciences, said: “As well as NASA’s Mars Reconnaissance Orbiter imager, the NASA InSight seismometers were operating in the second half of 2021, which is when these impacts were recorded as having occurred. 

© iStock/ClaudioVentrella

“They have detected these impact events in the form of large seismic activity, or a ‘bang’, firstly as the meteorite passed through the atmosphere and then again as it hit the ground. 

“Impact events happen all the time on both Earth and Mars, but generally involve small rocks from space that only graze the atmosphere. On occasion, we get impacts that can penetrate deeper into the atmosphere to form a noticeable bang in the atmosphere or on the ground, which was the case here.” 

The importance of studying meteorite impact events 

The size of the meteorite impacts, which occurred in a region called Amazonis Planitia, generated the only two quakes known to have been caused by this, said co-author of the study, PhD student Andrea Rajšić, who completed the research while at Curtin’s Space Science and Technology Centre. 

The marsquake caused by this impact is the first to have surface waves that ripple across the planet’s crust. 

“There are not that many large quakes detected on Mars, whether they be driven by interior geological forces or in this case external impacts, but when they do occur, they help with deep-interior mapping of Mars,” Rajšić said. 

“Impact events are extremely helpful in seismology because they can be considered as a constrained seismic source with a known location. This is a fantastic way to peek into the interior structure of the Red Planet.” 

One of the meteorite impacts had excavated large chunks of ice buried closer to the Martian equator than ever found before. These findings will help contribute to our current understanding of the Mars water reservoir.  

Associate Professor Miljkovic stated: “This knowledge is useful for many reasons, from the potential future habitation of Mars by humans and their ability to locate water as a resource, to the fundamental understanding of the structure of Mars as a planet. If we are to understand the formation and evolution of our own planet, we ought to understand other terrestrial planets too.”  

Dr Rajšić completed her PhD studies contributing to this work at the Space Science and Technology Centre at Curtin. Curtin’s part of this research was funded by the Australian Research Council. 

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The body of a Ugandan Olympic athlete who was set on fire by her partner is received by family

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NAIROBI, Kenya (AP) — The body of Ugandan Olympic athlete Rebecca Cheptegei — who died after being set on fire by her partner in Kenya — was received Friday by family and anti-femicide crusaders, ahead of her burial a day later.

Cheptegei’s family met with dozens of activists Friday who had marched to the Moi Teaching and Referral Hospital’s morgue in the western city of Eldoret while chanting anti-femicide slogans.

She is the fourth female athlete to have been killed by her partner in Kenya in yet another case of gender-based violence in recent years.

Viola Cheptoo, the founder of Tirop Angels – an organization that was formed in honor of athlete Agnes Tirop, who was stabbed to death in 2021, said stakeholders need to ensure this is the last death of an athlete due to gender-based violence.

“We are here to say that enough is enough, we are tired of burying our sisters due to GBV,” she said.

It was a somber mood at the morgue as athletes and family members viewed Cheptegei’s body which sustained 80% of burns after she was doused with gasoline by her partner Dickson Ndiema. Ndiema sustained 30% burns on his body and later succumbed.

Ndiema and Cheptegei were said to have quarreled over a piece of land that the athlete bought in Kenya, according to a report filed by the local chief.

Cheptegei competed in the women’s marathon at the Paris Olympics less than a month before the attack. She finished in 44th place.

Cheptegei’s father, Joseph, said that the body will make a brief stop at their home in the Endebess area before proceeding to Bukwo in eastern Uganda for a night vigil and burial on Saturday.

“We are in the final part of giving my daughter the last respect,” a visibly distraught Joseph said.

He told reporters last week that Ndiema was stalking and threatening Cheptegei and the family had informed police.

Kenya’s high rates of violence against women have prompted marches by ordinary citizens in towns and cities this year.

Four in 10 women or an estimated 41% of dating or married Kenyan women have experienced physical or sexual violence perpetrated by their current or most recent partner, according to the Kenya Demographic and Health Survey 2022.

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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B.C. sets up a panel on bear deaths, will review conservation officer training

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VICTORIA – The British Columbia government is partnering with a bear welfare group to reduce the number of bears being euthanized in the province.

Nicholas Scapillati, executive director of Grizzly Bear Foundation, said Monday that it comes after months-long discussions with the province on how to protect bears, with the goal to give the animals a “better and second chance at life in the wild.”

Scapillati said what’s exciting about the project is that the government is open to working with outside experts and the public.

“So, they’ll be working through Indigenous knowledge and scientific understanding, bringing in the latest techniques and training expertise from leading experts,” he said in an interview.

B.C. government data show conservation officers destroyed 603 black bears and 23 grizzly bears in 2023, while 154 black bears were killed by officers in the first six months of this year.

Scapillati said the group will publish a report with recommendations by next spring, while an independent oversight committee will be set up to review all bear encounters with conservation officers to provide advice to the government.

Environment Minister George Heyman said in a statement that they are looking for new ways to ensure conservation officers “have the trust of the communities they serve,” and the panel will make recommendations to enhance officer training and improve policies.

Lesley Fox, with the wildlife protection group The Fur-Bearers, said they’ve been calling for such a committee for decades.

“This move demonstrates the government is listening,” said Fox. “I suspect, because of the impending election, their listening skills are potentially a little sharper than they normally are.”

Fox said the partnership came from “a place of long frustration” as provincial conservation officers kill more than 500 black bears every year on average, and the public is “no longer tolerating this kind of approach.”

“I think that the conservation officer service and the B.C. government are aware they need to change, and certainly the public has been asking for it,” said Fox.

Fox said there’s a lot of optimism about the new partnership, but, as with any government, there will likely be a lot of red tape to get through.

“I think speed is going to be important, whether or not the committee has the ability to make change and make change relatively quickly without having to study an issue to death, ” said Fox.

This report by The Canadian Press was first published Sept. 9, 2024.

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