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A sophisticated tensioning system was identified in the tails of early pterosaurs, which enabled these prehistoric creatures to navigate the skies during the dinosaur era. The long tails of these flying reptiles ended with vanes, thin leaf-like tissue structures, which were integral to their flight. Without stiffness, these vanes would have compromised flight efficiency, leading paleontologists to explore the structural mechanisms that kept them stable. The findings, backed by laser technology, offer new insights into the evolutionary traits of these creatures.

Structural Findings in Tail Vanes

According to the study published in eLife, the vanes of early pterosaurs were supported by criss-crossing fibres and tube-like structures. As reported by Live Science, researchers used laser-stimulated fluorescence to examine fossils, revealing the intricate internal structures of the vanes. These acted as a tensioning system akin to a ship’s sail, allowing the vanes to stiffen under wind pressure. Natalia Jagielska, now curator at Lyme Regis Museum, remarked that reconstructing such details from fossils millions of years old remains remarkable.

Dual Purpose of Pterosaur Tails

As per the researchers, the tensioning system not only supported flight but also likely played a role in displays, such as mate attraction. The study highlighted that the functionality of these tails went beyond aerodynamics, contributing to the behavioural repertoire of pterosaurs. David Martill, emeritus professor at the University of Portsmouth, lauded the innovative approach of the researchers in uncovering the complexity of these structures.

Evolutionary Adaptations Over Time

It was reported that pterosaurs with long tails appeared during the Triassic Period but evolved to have shorter tails by the Jurassic era. The Pterodactyloidea, a notable group within the species, demonstrated reduced tail lengths, which likely enhanced flight manoeuvrability. As reported by Live Science, Martill noted that while long tails could hinder flight, they added visual appeal, drawing a parallel to the peacock.

The study underlines how evolutionary traits in early pterosaurs balanced practical and aesthetic needs, shaping their place in prehistoric ecosystems.

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Blue Origin Prepares Second New Glenn Launch, Aims for Better Landing

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Blue Origin Prepares Second New Glenn Launch, Aims for Better Landing

The second launch of Blue Origin’s New Glenn rocket is being targeted for late spring, as efforts are being made to enhance its landing capabilities. The 320-foot-tall rocket was first launched on January 16, 2025, from Florida’s Space Coast, successfully deploying a test version of the Blue Ring spacecraft into orbit. However, the booster stage failed to land on the recovery platform at sea. The company had anticipated this possibility and has since identified potential issues affecting the landing sequence. Adjustments to the booster are being made in preparation for the upcoming launch.

Landing Challenges Identified and Addressed

According to reports, the engines performed as expected during the descent, but issues in delivering fuel from the tanks prevented a successful touchdown. Blue Origin Chief Executive Officer Dave Limp stated at the 27th Annual Commercial Space Conference that a combination of factors contributed to the failed landing. While specific technical details were not disclosed, it was mentioned that modifications are being implemented on the second booster. These changes are expected to improve landing success without delaying the next flight.

Payload for the Second Flight Yet to Be Finalized

The payload for the upcoming launch has not been officially confirmed. Reports indicate that Blue Origin is considering several options, including potential commercial missions. If no suitable payload is available, the rocket may carry a mass simulator for testing purposes. Limp mentioned that the first three flights of New Glenn are regarded as developmental missions, while commercial launches are expected to begin from the fourth flight onward.

New Glenn’s Capabilities and Future Prospects

New Glenn, under development for nearly a decade, is designed to transport 50 tons of payload to low Earth orbit. Its payload fairing, measuring 23 feet in diameter, is larger than that of any operational rocket. The company aims to establish New Glenn as a competitive launch vehicle for commercial and government clients, with an emphasis on reusability and cost efficiency.

(Except for the headline, this story has not been edited by NDTV staff and is published from a press release)

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Curiosity Rover Observes Iridescent Clouds on Mars, Offering New Insights

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Curiosity Rover Observes Iridescent Clouds on Mars, Offering New Insights

Images captured by NASA’s Curiosity rover have shown rare iridescent clouds drifting across the Martian sky. These formations, observed in the planet’s twilight, were seen at high altitudes where sunlight still reaches them despite nightfall on the surface. The images were taken on January 17, using one of the rover’s onboard cameras, with individual frames stitched together to create a time-lapse video. Scientists are analysing these cloud patterns to gain insights into Mars’ atmospheric processes and climate conditions.

Details of the Findings

A report from NASA’s Jet Propulsion Laboratory (JPL) detailed that these high-altitude clouds, composed of carbon dioxide ice, were seen floating between 60 and 80 kilometres above the surface. The cold temperatures at these heights cause the condensation of carbon dioxide, forming distinctive cloud structures. Some of the ice crystals were observed descending before evaporating at approximately 50 kilometres, where temperatures begin to rise.

As reported by space.com,that this is the fourth Martian year in which Curiosity has recorded these cloud formations. The phenomenon was first observed by NASA’s Pathfinder mission in 1997, which captured images from a location just north of the Martian equator.

Expert Analysis on Martian Clouds

In a statement to NASA’s JPL, Mark Lemmon, Atmospheric Scientist at the Space Science Institute in Colorado, remarked that the first sighting of these iridescent clouds was initially thought to be a colour anomaly. He highlighted that their seasonal recurrence has allowed researchers to predict their appearance and plan observations in advance.

Last year, scientists produced the most comprehensive cloud map of Mars, compiled from two decades of data gathered by the European Space Agency’s Mars Express orbiter. This study classified a range of cloud formations, including patterns not seen on Earth. Daniela Tirsch, Planetary Geologist at the German Aerospace Center, commented at the time that Martian clouds exhibit significant diversity.

Unanswered Questions About Cloud Formation

Observations have so far been limited to specific regions, with no twilight clouds detected by the Perseverance rover, which landed in Jezero Crater in 2021. This has led scientists to question what makes certain areas more conducive to their formation.

Lemmon explained that carbon dioxide was not expected to condense into ice at these altitudes, suggesting an unknown cooling mechanism at work. He pointed to atmospheric gravity waves as a possible factor, though their role in Martian weather patterns remains uncertain. Further studies are planned to better understand these cloud formations and their implications for the planet’s climate.

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Genetic Mutations May Directly Influence Epigenetic Clocks and Aging

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Genetic Mutations May Directly Influence Epigenetic Clocks and Aging

Scientists have identified a potential link between genetic mutations and epigenetic clocks, shedding new light on the mechanisms behind biological aging. This discovery could reshape how aging is understood and measured. The study explores how DNA mutations accumulating over time may directly influence epigenetic changes, which are often used to estimate biological age. Researchers have examined these connections in detail, aiming to determine whether these processes drive aging or merely reflect it. The findings suggest that a deeper relationship exists between these genetic alterations, which could have significant implications for longevity research.

Genetic and Epigenetic Changes in Aging

According to a study published in Nature Aging on January 13, a correlation has been observed between random genetic mutations and epigenetic modifications that contribute to biological aging. DNA mutations, which arise from cell replication errors, environmental factors, and the gradual decline of repair mechanisms, have long been associated with age-related diseases such as cancer and neurodegeneration. However, these mutations alone do not fully explain aging.

Epigenetic changes, which regulate gene activity without altering the DNA sequence, have been widely studied using “epigenetic clocks.” These clocks track specific DNA markers to estimate biological age. The study suggests that mutations influence these markers, and in turn, epigenetic modifications may affect mutation patterns. This bidirectional relationship has raised new questions about whether epigenetic changes are merely symptoms of aging or active participants in the process.

Scientific Perspectives on the Findings

Dr. Steven Cummings, Executive Director of the San Francisco Coordinating Center at the University of California, San Francisco, stated to Live Science, that a strong correlation between DNA mutations and epigenetic markers was identified. According to him, the study indicates that mutations at specific DNA sites result in distinct epigenetic changes, leading to cascading effects across the genome.
Professor Trey Ideker from the University of California, San Diego, added that a significant loss of DNA methylation was observed at mutated sites, while surrounding areas exhibited increased methylation. This ripple effect extended thousands of base pairs beyond the original mutation, though the precise mechanism remains unclear. He emphasized the need for further research to determine whether mutations trigger epigenetic shifts or vice versa.

Implications for Aging Research

The study’s findings suggest that genetic and epigenetic changes might be influenced by an underlying process that remains unidentified. Dr. Cummings proposed that DNA mutations could be the primary drivers of aging, while epigenetic changes may reflect this process rather than cause it. If confirmed, this would present a significant challenge for anti-aging research, as reversing mutations is considerably more complex than modifying epigenetic markers.

Experts have pointed out that additional studies are required to validate these conclusions, particularly in non-cancerous tissues. The data used in the study were primarily derived from cancer patients, making it necessary to examine whether the same patterns exist in healthy individuals. Longitudinal studies tracking genetic and epigenetic changes over time could provide a clearer picture of their relationship to aging.

Further investigations may include laboratory experiments where specific mutations are induced in cells to observe subsequent epigenetic modifications. These insights could help refine the use of epigenetic clocks and lead to a more comprehensive understanding of aging at the molecular level.

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