The giant blackhole at the core of the Milky Way became 75 times brighter in just 2 hours, and scientists have no idea why
Compared to an active nucleus which spews out light and heat, Sagittarius A*, the supermassive black hole at the heart of the Milky Way, is usually quite calm, displaying minimal fluctuations in its brightness.
On May 13 scientists observing with the Keck Telescope on the summit of Mauna Kea in Hawaii noticed the black hole growing 75 times brighter in the near-infrared band of the light spectrum. Sgr A* is the closest black hole to us, located just 26,000 light-years from Earth.
A time lapse was captured showing the scene condensed down into a few seconds:
Tuan Do, a UCLA astronomer told ScienceAlert that he didn’t even know what he was looking at initially.
He explained:
I was pretty surprised at first and then very excited.
The black hole was so bright I at first mistook it for the star S0-2, because I had never seen Sgr A* that bright. Over the next few frames, though, it was clear the source was variable and had to be the black hole. I knew almost right away there was probably something interesting going on with the black hole.
In a forthcoming study set to be published in The Astrophysical Journal Letters, Do explains the Milky Way’s supermassive black hole ‘reached much brighter flux levels in 2019 than ever measured at near-infrared wavelengths’.
The scientists are still unsure about what exactly caused the black hole to suddenly light up but data is being gathered in an attempt to figure it out.
According to ScienceAlert, black holes themselves don’t emit radiation which we can detect but the surroundings do when the black hole’s gravitational forces generate immense friction, which produces radiation.
The radiation translates as brightness when we view it with a telescope so when the surroundings of a black hole flare like they did on May 13 it’s a sign something may have come close enough to be grabbed by its gravity.
One possibility is an object thought to be a gas cloud, known as G2, which approached within 36 light-hours of Sagittarius A* in 2014. If it is a gas cloud the proximity should have torn the object apart, but nothing happened. However, scientists have suggested the recent sudden brightness was a delayed reaction.
Another possibility is the star S0-2, which is on a 16-year elliptical orbit around Sgr A* and last year made its closest approach.
Do said:
One of the possibilities is that the star S0-2, when it passed close to the black hole last year, changed the way gas flows into the black hole and so more gas is falling on it, leading it to become more variable.
Astronomers will continue to observe the supermassive black hole in the coming weeks to gather more data and the team are currently awaiting results from other telescopes which have been observing Sgr A* in the last few months.
STAY UPDATED
Join our community of keen travellers, wildlife enthusiasts and adventure seekers.
1 Gang Of Poachers Killed 10% Of All Javan Rhinos Since 2019
April 29, 2024
Inside Indonesia's Battle Against Javan Rhino Poaching
In the dense, lush greenery of Ujung Kulon National Park, a silent war is being waged. This isn't just a fight for territory or power—it's a battle for survival. The Javan rhino, a majestic relic of ancient wilderness, is teetering perilously close to oblivion.
Recent courtroom revelations in Indonesia have exposed a heart-wrenching reality: a single gang of poachers, operating with chilling efficiency, is suspected of killing at least 10% of the world's remaining Javan rhinos since 2019.
The crux of this environmental crime drama unfolded earlier this month when a suspect, referred to as Sunendi, was indicted for multiple offenses including poaching and illegal possession of firearms. Sunendi's indictment throws into harsh relief the challenges of protecting one of the most endangered species on Earth.
With the global population of these rhinos estimated at a mere 70 individuals, the loss of even one is a blow to biodiversity.
The Brutal Operation
According to court documents, Sunendi and his associates allegedly infiltrated the park from a village on its southern boundary. Their method was brutal and direct; in one instance, a rhino was killed as coldly as "slaughtering a goat."
The horn, a prized possession in illegal wildlife markets, was then hidden and later sold for a hefty sum. The operation was not just a series of isolated incidents but a systematic assault on a species already on the brink.
The broader implications of these poaching activities are staggering. Nina Fascione, executive director of the International Rhino Foundation (IRF), has called for severe penalties for those involved, underscoring the need for a strong judicial response to deter future crimes.
Fascione stated:
"Other would-be poachers need to know that wildlife crimes will not be tolerated in Indonesia,".
Systemic Issues and Security Flaws
How could such a breach in security occur in a park that is guarded around the clock and monitored by an array of camera traps? Reports suggest that the poachers were intimately familiar with the routines of the park's guards, exploiting gaps with precision.
In response, park officials have now intensified security measures and closed off routes used by tourists and locals alike, transforming the park into a fortress of sorts. Yet, these measures bring their own set of challenges and questions about the balance between conservation and community access.
The plight of the Javan rhino is emblematic of a larger crisis facing Indonesia's wildlife. The island has already seen the extinction of the Javan and Bali tigers. The current situation with the rhinos serves as a grim reminder of the relentless pressure exerted by human activities on wildlife.
The debate over setting up a second habitat for the Javan rhino, away from the threat of natural disasters and human encroachment, continues. Yet, as the years pass, the plans remain just that—plans.
Hope in the Midst of Despair
Despite the grim news, there are glimmers of hope. The park has witnessed the birth of new rhino calves, a testament to the resilience of life. Each new calf represents a flicker of light in the darkness, a potential turnaround in the narrative of extinction. Conservation efforts, while challenged, are not in vain.
"This is not just a crime against Indonesia but against the world," Fascione remarked. Indeed, the fight to save the Javan rhino is not just about saving a single species; it's about maintaining the ecological balance and ensuring that future generations will inherit a world as rich and diverse as the one we live in today.
The story of the Javan rhino is a poignant reminder of our shared responsibility. It challenges us to reflect on our role in this interconnected world and compels us to act, not just as bystanders, but as guardians of our planet's future.
China: Palaeontologists Discover the Largest Raptor Tracks Ever Found
April 29, 2024
Exploring Giants of the Ancient World: The Fujianipus Yingliangi and the New Frontier in Dinosaur Discoveries
In the depths of southeastern China, paleontologists have uncovered a glimpse into a world dominated by creatures far larger and more awe-inspiring than those depicted in Hollywood's most vivid imaginings. A recent find at the Longxiang tracksite has brought to light the largest fossilized raptor footprints ever discovered, belonging to the newly identified Fujianipus yingliangi.
This discovery, detailed in the prestigious journal iScience, not only challenges our understanding of these prehistoric predators but also redefines the possible scale of raptor evolution.
A Giant Among Raptors
The Fujianipus, meaning "foot of Fujian," is named after the region where its remarkable tracks were found. The creature that made these tracks roamed the earth approximately 96 million years ago, during the Cretaceous period, a time when dinosaurs were the uncontested rulers of the land. The site where these footprints were discovered spans an impressive 17,000 square feet and contains over 240 identifiable dinosaur tracks, but none so striking as those of the Fujianipus.
Each of the five tracks measures about 14 inches in length, suggesting a raptor of about 16 feet in length and a hip height of six feet—dimensions that make Fujianipus significantly larger than the much-feared velociraptors, which were often no more than six feet long.
"You know a raptor track when you see it,"
Lida Xing, the Chinese paleontologist who led the discovery team, remarkd. However, he noted that these tracks were distinct from any previously identified.
The Unique Biology of a Predator
What sets the Fujianipus apart, besides its size, is the unique characteristic of its tracks. Typical carnivorous dinosaurs have three forward-pointing toes. Raptors, however, had a distinctive walking style; they held their middle toe aloft, which bore a "wicked recurved weapon" claw, larger than the other two.
This behavior, which prevented the middle claw from becoming dulled, resulted in tracks that appear to have only two toes—a telltale sign of a raptor footprint.
Scott Persons, a professor at the College of Charleston and member of the research team, explains,
"Their tracks look like they could have been made by a giant turkey, emu, or other ground bird."
This two-toed mark is a hallmark of deinonychosaurs, better known as raptors, which includes the Fujianipus.
A Shift in Predator Dynamics
The size of Fujianipus implies not just a larger physical stature but an increased predatory capability. "The large size of Fujianipus implies an increased predatory ability and a shift toward larger prey," according to the research paper. This suggests that Fujianipus was not only competing with the largest dinosaurs of its day but was also navigating a changing ecological landscape as tyrannosaurs began to emerge.
Steve Brusatte, a paleontologist at the University of Edinburgh, who was not involved in the study, notes that during this period, tyrannosaurs and raptors were both vying for the crown of the mid-sized predator. This competition might have driven the evolutionary pressure to grow larger and adapt to new niches higher up the food chain.
The discovery of Fujianipus is a stark reminder of the complex and dynamic world of the Late Cretaceous period. It challenges previous conceptions and opens new avenues for research into the behavior, evolution, and ecological roles of raptors. As we continue to piece together the puzzle of our planet's distant past, each new discovery like Fujianipus adds depth and color to the story of life on Earth.
In the grand tapestry of dinosaur research, the discovery of Fujianipus stands out not just for its size but for the implications it holds for understanding predator-prey dynamics in ancient ecosystems. As more findings like this come to light, they not only enrich our knowledge but also stoke the flames of curiosity and passion for uncovering the secrets of a world long gone.
Source: Smithsonian
World’s Largest Wildlife Crossing Will Save Thousands Of Animals In California
April 26, 2024
California's Groundbreaking Wildlife Crossing: A Bold Step Towards Conservation
In the bustling expanse of Los Angeles County, a pioneering initiative is taking shape above the relentless traffic of Highway 101. The plan is to develop the world's largest wildlife crossing.
The Wallis Annenberg Wildlife Crossing, slated for completion in 2025, represents not just an engineering marvel but a beacon of hope for wildlife conservation.
Spanning 210 feet, this bridge is poised to be the world’s largest of its kind, designed specifically to safeguard a diverse array of animals—from majestic mountain lions to discreet deer and even the tiniest ants—enabling them to safely traverse between the Santa Monica Mountains and the Simi Hills.
The need for such a crossing has become increasingly urgent. America's roads are perilous for wildlife, with over one million wildlife-vehicle collisions annually causing not only animal casualties but also human fatalities and injuries. This bridge aims to mitigate these incidents by offering safe passage above eight lanes of hectic traffic, thereby preventing the dangerous attempts by animals to cross busy roadways.
The project, with a hefty tag of $92 million, is a testament to the power of collaboration. Funded through a public-private partnership that includes Caltrans, the National Park Service, and the National Wildlife Federation, the crossing is a bold statement in ecological intervention.
Groundbreaking began on Earth Day two years ago, marking a significant step forward in environmental stewardship.
Structurally, the crossing is as robust as it is ambitious. Over the coming months, crews will install more than 80 concrete girders, each weighing up to 140 tons. Once completed, the bridge will not only serve its functional purpose but will also be a habitat in itself, draped in over a million native plants and additional greenery to mimic the natural environments of the crossing wildlife.
One cannot overlook the poignant narrative of P-22, the mountain lion whose life and struggles have come to symbolize the plight of urban wildlife. Born around 2010, P-22's journey across two major freeways to Griffith Park highlighted the severe challenges faced by animals due to urban sprawl.
His subsequent health issues and untimely death in December after a series of unfortunate events underscore the critical need for solutions like the wildlife crossing. P-22's legacy is thus immortalized, inspiring not just donations but a wider awareness and commitment to wildlife conservation.
This crossing does more than bridge two physical locations; it connects us with a larger story of survival and adaptation. It forces us to reckon with the impact of our urban environments on the natural world. By weaving natural landscapes into our urban fabric, projects like the Annenberg Crossing guide us toward a more harmonious coexistence with nature.
Experts believe that without such interventions, the genetic diversity of local wildlife populations, particularly mountain lions, could deteriorate to the point of local extinction. The bridge is thus a critical step in preserving these populations for future generations.
As we anticipate the completion of this monumental project, it's clear that the Wallis Annenberg Wildlife Crossing is more than just a pathway over a freeway—it is a lifeline, a new hope for wildlife conservation in urban settings.
Orange Sahara Dust Cloud Descends Over Athens
April 24, 2024
Orange Dust Haze Over Athens: The Sahara's Impact and What Lies Ahead
As Athenians woke up to an otherworldly scene, a striking orange haze enveloped the cityscape, an eerie reminder of nature's untamed forces. This isn't the first time the skies over Greece have turned shades of Martian orange, but the recent Sahara dust event is among the most severe since 2018.
This phenomenon, resulting from vast clouds of mineral dust carried from the Sahara Desert, casts a surreal glow and a thick blanket over Athens, extending as far north as Thessaloniki.
A Persistent and Expansive Issue. The Sahara Desert, an immense landscape of arid expanses, annually releases between 60 to 200 million tonnes of mineral dust into the atmosphere. While much of this dust settles back to the earth's surface relatively quickly, finer particles are swept across continents by upper-level winds.
In this instance, the dust not only shrouded Greece but also affected regions as disparate as Switzerland and southern France in late March and early April. This wide-reaching impact highlights the interconnectedness of environmental phenomena, transcending geographical boundaries.
Atmospheric Conditions and Public Health
The mingling of dust with unusually high temperatures has created stifling conditions in southern Greece. Kostas Lagouvardos, a noted meteorologist, likened the view from a local weather station to the surface of Mars, emphasizing the dramatic alteration in the landscape and atmosphere. The compromised air quality poses significant health risks, particularly for those with respiratory ailments. Greek authorities have advised the public to wear protective masks, limit outdoor activities, and postpone physical exercise until the air clears—a temporary but vital adaptation to the hazardous conditions.
Complicating the environmental challenge are the wildfires that have flared up concurrently. In the past 24 hours alone, the Greek fire service has battled 25 wildfires. One particularly fierce blaze near a naval base on Crete necessitated the evacuation of homes and a kindergarten as temperatures on the island soared above 30°C (86°F). This confluence of dust, heat, and fire underscores the broader climatic vulnerabilities that Greece, like many parts of the world, faces amid changing global weather patterns.
Looking Ahead: Environmental Implications and Actions
The recurring dust episodes and their intensification call for a reevaluation of environmental and health preparedness strategies. Enhancing predictive meteorological models and public health advisories can play pivotal roles in mitigating the impacts of such dust storms. Moreover, understanding the broader implications of these dust clouds on climate change, soil deposition, and even marine ecosystems will be crucial.
As we contemplate the orange haze that temporarily transforms day into dusk, it serves as a vivid, visual reminder of our planet's dynamic and interconnected environmental systems.
The need for increased research, international cooperation, and proactive measures has never been more apparent, ensuring that societies can better anticipate, respond to, and ultimately thrive amidst these challenges. The dust will settle, but the conversation and actions it precipitates must continue to evolve.
‘Whale Bones’ Capturer Earns Underwater Photographer Of The Year
April 24, 2024
In the icy waters beneath Greenland's vast frozen expanses, a spectacle of history and present intertwines, illuminated by the minimal natural light filtering through the thick ice sheet above.
Here, Swedish underwater photographer Alex Dawson captured a scene so compelling it earned him the prestigious title of Underwater Photographer of the Year 2024.
His photograph, titled "Whale Bones," portrays a diver navigating the remnants of a whaling past, a stark reminder of the transient yet impactful intersections between human activity and marine life.
The image features freediver Anna Von Boetticher, a friend and frequent collaborator of Dawson, as she explores the skeletal remains of a minke whale. The setting is haunting and ethereal. Located no more than 7 meters below the ice's surface, the site is relatively accessible, yet the conditions are anything but ordinary. The limited light creates an otherworldly glow around the diver, who, equipped with a torch, appears as an explorer from another planet.
Alex Mustard, chair of the judging panel for the Underwater Photographer of the Year 2024 awards, described the photograph as being shot in "the toughest conditions." He praised the composition for its ability to guide the viewer through the narrative seamlessly, highlighting the "visiting alien" feel that the diver's suit and torch contribute to the scene.
The image not only captures the physical remnants found beneath the ice but also tells a broader story of ecological and historical significance.
Celebrating his victory, Dawson took to Instagram to express his gratitude and honor for receiving the award. His post reflects a deep appreciation for the craft and the profound experiences that underwater photography can afford.
He noted, underscoring the challenges and unique aspects of capturing such a shot:
"This image was submitted in the Wide Angle category with freediving mode,"
Anna Von Boetticher's own reflections on social media add a personal touch to the achievement. She shared her pride in both the recognition of Dawson's work and her role in it, celebrating the collaborative spirit that such projects entail. Her words highlight the partnership and shared dedication required to bring such compelling underwater narratives to the surface.
This win for Dawson is not merely a personal triumph but a resonant moment for the underwater photography community. It underscores the genre's capacity to engage with pressing environmental narratives and to evoke both beauty and contemplation through visual storytelling. The photograph of the whale bones beneath Greenland's ice is a poignant reminder of the delicate balance marine ecosystems must navigate amidst human influence.
As the viewer's eyes traverse the contours of whale bones and the diver's illuminated path, the image of "Whale Bones" invites a meditative pause on the impact of past actions on the present and future marine environments. It serves as both a window and a mirror—showing us the hidden wonders of underwater realms and reflecting our own roles within these narratives.
In exploring these depths, Dawson and Von Boetticher not only capture images but also capture imaginations, prompting a dialogue about conservation, exploration, and the unseen parts of our world.