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Microbial Life Colonizes Post-Impact Craters And Thrives For Millions Of Years
78 million years ago, a 1.6 km asteroid slammed into what is now Finland, creating a crater 23 km (14 mi) wide and 750 km deep. The catastrophic impact created a fractured hydrothermal system in the shattered bedrock under the crater. There’s evidence from other impact structures that in the aftermath of a collision, life colonized the shattered rock and heated water that flowed through it. But determining when the colonization happened is challenging.
New research shows for the first time exactly when that colonization happened. A team of researchers has zeroed in on the date that microbial life populated the hydrothermal system under the 78 million year old Lappajärvi impact structure.
Their research is titled “Deep microbial colonization during impact-generated hydrothermal circulation at the Lappajärvi impact structure, Finland” and is published in Nature Communications. Jacob Gustafsson, a PhD student at Linnaeus University in Sweden, is the first author.
“This is incredibly exciting research as it connects the dots for the first time.” – Dr. Gordon Osinski, Western University, Canada.
“Deeply fractured rocks of meteorite impact structures have been hypothesized as hot spots for microbial colonization on Earth and other planetary bodies,” the authors write. “Biosignatures of such colonization are rare, however, and most importantly, direct geochronological evidence linking the colonization to the impact-generated hydrothermal systems are completely lacking.”
Illustration of new research findings in the Lappajärvi crater, Finland, where traces of ancient life have been discovered in the crater’s fractures. The magnified section highlights the blue-marked fracture zones where microbial signatures have been identified. Image Credit: Henrik Drake, Gordon Osinski
The discovery is based on sulphite reduction. Some microbes employ an anaerobic respiratory process that uses sulfate to accept electrons rather than oxygen. It’s a fundamental process that contributes to Earth’s global sulfate and carbon cycles. Basically, microbes break down organic compounds as an energy source and reduce sulfate to hydrogen sulfide.
The researchers used powerful, cutting-edge isotopic biosignature analysis and radioisotopic dating to trace microbial sulfate reduction in minerals and fractures in the hydrothermal system under the crater.
“This is the first time we can directly link microbial activity to a meteorite impact using geochronological methods. It shows that such craters can serve as habitats for life long in the aftermath of the impact,” says Henrik Drake, a professor at Linnaeus University, Sweden, and senior author of the study.
“The first detected mineral precipitation at habitable temperatures for life (47.0 ± 7.1 °C) occurred at 73.6 ± 2.2 Ma and featured substantially 34S-depleted pyrite consistent with microbial sulfate reduction,” the authors explain in their research.
This figure shows some of the findings. The pyrite is of particular interest. The 34Sulfur-depleted pyrite is consistent with microbial sulfate reduction. It formed about five million years after the impact when the hydrothermal system had cooled to temperatures that were habitable for life. The calcite is another powerful biosignature, and it appeared 10 million years post-impact, indicating that microbes thrived here for millions of years. Image Credit: Gustafsson et al. 2025 NatComm
“What is most exciting is that we do not only see signs of life, but we can pinpoint exactly when it happened. This gives us a timeline for how life finds a way after a catastrophic event” says Jacob Gustafsson, PhD student at Linnaeus University and first author of the study.
More evidence of microbial colonization appears about 10 million years post-impact as the temperature continued to gradually decrease. Minerals precipitated into vugs, which is a geological term for cavities lined with mineral crystals. These minerals feature 13 Calcite, which forms in association with microbial sulfate reduction. It’s a powerful and convincing biosignature that strengthens the findings. At 10 million years post-impact, these minerals are further evidence that microbes thrived for a long time in the hydrothermal system.
Co-author Dr. Gordon Osinski, from Western University in Canada, said “This is incredibly exciting research as it connects the dots for the first time. Previously, we’ve found evidence that microbes colonized impact craters, but there has always been questions about when this occurred and if it was due to the impact event, or some other process millions of years later. Until now.”
These findings open a window into how life might get started on habitable worlds. Asteroids are known to carry the basic building blocks of life, including amino acids. It’s possible they not only spread these materials throughout solar systems and galaxies in accordance with panspermia, but that they also create a ready-made home for life to gain a foothold in. The research also shows how life can rebound after a catastrophic impact that could overwhelm a biosphere.
The researchers say that the microbial colonization of the Lappajärvi impact structure is an analog for the emergence of life on early Earth, and even on Mars. Their methods of analysis can be used to study the microbial colonization of other impact structures on Earth. Beyond that, they’re also applicable to any sample return missions from Mars or other bodies.
“These insights confirm the capacity of medium-sized (and large) meteorite impacts to generate long-lasting hydrothermal systems, enabling microbial colonization as the crater cools to ambient conditions, an effect that may have important implications for the emergence of life on Earth and beyond,” the authors conclude.
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Direct Confirmation Of Two Baby Planets Forming Around A Young Sun-like Star
As the number of exoplanet detections has breached 6,000 and continues to grow, scientists are finding a wide variety of different solar system architectures. Critical to understanding how these architectures take shape is finding young planets forming around very young stars. In 2025 a team of astronomers announced the discovery of a planet about 5 times more massive than Jupiter around a star that’s very much a younger version of our Sun.
The star is called WISPIT 2, is about 437 light-years away, and has around 1.08 solar masses. It’s very young, at only about 5 million years old. It’s so young it hasn’t yet commenced its life of fusion on the main sequence. That also means that it’s in the stage where young planets are still forming. Taken together, it’s a helpful analogue for our Solar System.
The exoplanet discovered around the star last year is named WISPIT 2-b, following convention. It was found with the Very Large Telescope (VLT) and its Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument. The powerful VLT was able to image the planet, and that image became the ESO’s Picture of the Week.
This ESO Picture of the Week from August 26, 2025 shows the exoplanet WISPIT 2b as it forms in the protoplanetary disk around the star WISPIT 2. The ESO said it’s “the first clear detection of a baby planet in a disc with multiple rings.” Astronomers think that the gaps in the disk are created by young planets as they accrete material from the disk. Image Credit: ESO/R. F. van Capelleveen et al.
Now some of the same astronomers behind the detection of WISPIT 2b have found another planet in the same young solar system, WISPIT 2c. The discovery is in new research published in The Astrophysical Journal Letters titled “Direct Spectroscopic Confirmation of the Young Embedded Protoplanet WISPIT 2c.” The lead author is Chloe Lawlor, a PhD student from the University of Galway’s Centre for Astronomy and the Ryan Institute.
“WISPIT 2 is a nearby young star with a multiringed disk that was recently confirmed to host a ∼4.9 MJup gas giant planet embedded in a large (60 au) gap at a radial separation of 57 au from the host star. We confirm and characterize a second, close-in planet in the WISPIT 2 system…” the authors write. WISPIT 2c is likely twice as massive as its sibling, and also closer to the host star, “with a mass range of 8–12 MJup and a radial separation of 14 au.,” the authors add.
The “Direct Spectroscopic Confirmation” in the study’s title refers to observations with VLT/SPHERE and VLTI/GRAVITY.
Exoplanets can sometimes appear as little more than anomalies in astronomical data, and background stars can mimic exoplanets, so direct spectroscopic confirmation is important. This type of confirmation can also constrain exoplanet physical models, tell us about an exoplanet’s composition, and provide other important data. Direct spectroscopic confirmation is also technically demanding, boosting the relevance of this work.
This image shows two planets forming around the young star WISPIT 2. The top images were captured with the ESO’s VLT/SPHERE. WISPIT 2c’s spectrum was captured with the VLTI/GRAVITY+ instrument. It shows the presence of carbon dioxide which is a common atmospheric component of gas giants. The CO2 detection is further confirmation that the object is an exoplanet. Image Credit: ESO/C. Lawlor, R. F. van Capelleveen et al.
The WISPIT 2 system is also important because the star is so similar to our Sun, and that always attracts the interest of astronomers. “WISPIT 2 is the best look into our own past that we have to date,” lead author Lawlor said in a press release.
The system is only the second instance of two exoplanets observed forming around their star, after PDS 70. PDS 70 is a young T-Tauri star about 370 light-years away with two confirmed and one unconfirmed exoplanet.
*This is the VLT/SPHERE image of PDS 70, the first clear image of a planet forming around its star. The planet is visible as a bright point to the right of the centre of the image, which is blacked out by the coronagraph mask used to block the blinding light of the central star. Image Credit: By ESO/A. Müller et al., CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=70463981*
“The young T Tauri star PDS 70 once acted as a lone candle in the dark for early planet formation studies, owing to its two confirmed planets, PDS 70b,” the authors write.
“WISPIT 2 now becomes an analog to PDS 70, offering a second laboratory for studying the formation and early evolution of a multiplanet system within its natal disk,” the researchers explain in their paper.
But WISPIT 2 has a more extended and resolved system of rings and gaps. “These structures suggest that more planets are currently forming, which we will eventually detect,” Lawlor said.
“WISPIT 2 gives us a critical laboratory not just to observe the formation of a single planet but an entire planetary system,” said study co-author Christian Ginski, a researcher at the University of Galway.
Watching as young planets form and an entire solar system takes shape was unattainable only a short time ago. It’s all possible because of powerful telescopes and their attached instruments.
“This detection of a new world in formation really showed the amazing potential of our current instrumentation,” said Richelle van Capelleveen, PhD student at Leiden Observatory, the Netherlands, leader of the previous study and a co-author on the new one.
“Critically our study made use of the recent upgrade to GRAVITY+ without which we would not have been able to get such a clear detection of the planet so close to its star,” said study co-author Guillaume Bourdarot, Bourdarot is a researcher at the Max Planck Institute for Extraterrestrial Physics in Germany. GRAVITY+ allows the imaging of even fainter astronomical objects at further distances than the original GRAVITY instrument.
With these detections, and with others on the way from even more powerful upcoming telescopes and instruments like the ELT, our understanding of solar system formation is poised to take a forward leap. The ELT features a gargantuan 39 meter primary mirror, and should see first light in March 2029.
There may even be another exoplanet detection waiting in the WISPIT 2 system itself. Both of the discovered exoplanets reside in gaps in the star’s protoplanetary disk, and there’s evidence of another gap in the disk that’s more distant from the star. “We suspect there may be a third planet carving out this gap” says Lawlor, “potentially of Saturn mass owing to the gap’s being much narrower and shallower.” Co-author Ginski noted that “with ESO’s upcoming Extremely Large Telescope, we may be able to directly image such a planet.”
Overall, the WISPIT 2 system is a rare opportunity to probe the emergence of solar system architectures. The authors speculate that the orbital separations in both PDS 70 and WISPIT 2 suggest a sort of Goldilocks Zone for giant planet formation, though that’s far from clear right now.
“While the available data remain limited, these results bring us one step closer to making direct connections between the initial conditions of planet formation and the final architectures of planetary systems,” the authors conclude.
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Wannabe Kim Kardashian died from lethal butt injections. Her injector was just convicted

A Florida woman faces years in prison after she flew to the Bay Area and met a woman in a hotel where she performed an illegal, deadly silicone injection into the woman’s buttocks for money.
Vivian Alexandra Gomez, 50, was convicted by a jury of felony involuntary manslaughter and practicing medicine without a valid license, resulting in the death of another, San Mateo County Dist. Atty. Steve Wagstaffe announced on Tuesday.
Gomez’s attorney didn’t respond to a request for comment.
In April 2023, Gomez flew to San Francisco International Airport to meet Christina Ashten Gourkani, a San Jose resident and social media model known for resembling Kim Kardashian.
Gourkani contacted Gomez, who ran an unlicensed cosmotology business out of Florida, about silicone injections to increase the size of her buttocks, Wagstaffe said.
Gomez met Gourkani and her fiance at a Marriott hotel in Burlingame, a few miles south of the airport, for the procedure.
Gourkani got at least two injections of what was supposed to be gluteal silicone but right after the injections, she began to go into distress, including convulsions.
She died the next day of respiratory failure and a pulmonary embolism. Gomez then flew back to Florida, where she was eventually arrested and returned to California.
The U.S. Food and Drug Administration in 2021 warned against using silicone injections to enlarge or shape parts of the body, saying the injections can cause long-term pain, embolisms, disfigurement, stroke and death.
Last October, a woman was convicted in Riverside County of murder for a lethal silicone injection after she’d previously been convicted of manslaughter for the practice.
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