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Identical twins, or monozygotic twins, are often perceived as indistinguishable, sharing nearly identical genomes and always being of the same sex. However, a common belief that they have identical fingerprints has been debunked, with research indicating that the odds of two individuals having the same fingerprints are less than one in 64 billion. While genetics plays a significant role in fingerprint formation, environmental factors during fetal development, such as umbilical cord length and position in the womb, also contribute to the unique patterns. Forensic expert Simona Francese notes that even post-birth conditions like scars or skin conditions can alter fingerprints. A recent study identified specific signaling molecules that, along with variations in finger shape and skin growth timing, lead to the distinctiveness of fingerprints, highlighting how minor fluctuations can create endless variations, even among nearly identical individuals. 
Published: Nov 22 2025, 2 ameznews.inResearchers have discovered a new type of lion roar, identified through AI technology, which could enhance conservation efforts for these iconic big cats. Traditionally, lions were thought to produce only a single, full-throated roar, but a study led by Jonathan Growcott from the University of Exeter reveals that they actually have four distinct vocalizations: moans, full-throated roars, intermediary roars, and grunts. The intermediary roar, characterized by a flatter sound with less pitch variation, was previously unclassified. This new understanding allows for more accurate monitoring of lion populations and individual identification, reducing human bias in assessments. Conducted in Nyerere National Park, Tanzania, the research utilized 50 recording units over 62 days and biologgers on lions in Zimbabwe. The findings suggest a need for a shift towards passive acoustic techniques in wildlife monitoring, which could be crucial for the conservation of lions and other endangered species.
Published: Nov 21 2025, 7 pmeznews.inA recent discussion on Reddit has sparked curiosity about the energy efficiency of walking on stilts, inspired by the Banna tribe in Ethiopia, who traditionally use them for herding cattle and cultural ceremonies. While Reddit users debated the practicality of stilt walking, a study from 1981 examined its efficiency. Researchers tested three experienced stilt walkers, measuring their speed and oxygen consumption while walking at various paces. They found that stilt walking allowed for longer strides and slightly increased speeds, but the overall energy efficiency was negligible. The study concluded that the weight of the stilts, which added to the metabolic cost of walking, offset any potential benefits. Thus, while stilts may offer advantages in specific contexts, such as avoiding animal attacks or enhancing visibility, they do not significantly improve energy efficiency compared to regular walking.
Published: Nov 21 2025, 7 pmeznews.inNeanderthals in present-day Belgium may have resorted to cannibalism around 45,000 years ago, specifically targeting the weakest members of rival clans, according to new research. Analysis of bones found in the Goyet caves revealed a minimum of six individuals, predominantly petite females and children, indicating they were deliberately chosen as victims. The remains, which show clear signs of butchering, represent the largest collection of cannibalized Neanderthal remains in northern Europe. Isotopic studies suggest these individuals were not local, and their physical characteristics indicate they were likely not mobile, raising questions about their presence in enemy territory. The study authors propose that this exocannibalism may have been driven by competition and conflict, coinciding with the arrival of Homo sapiens in the region, which could have intensified inter-group violence among Neanderthals. The findings are detailed in the journal *Scientific Reports*.
Published: Nov 21 2025, 10 pmeznews.inCapybaras, the largest rodents in the world, are renowned for their laid-back demeanor and surprising friendships, even with predators like crocodilians. Native to South America, these social animals often inhabit areas frequented by caimans, yet they rarely fall prey to them, primarily due to their formidable front teeth and size, which deter potential attacks. Dr. Elizabeth Congdon, a capybara expert, notes that while baby capybaras are vulnerable to various predators, adult capybaras are generally safe, especially when easier prey is available. Their amiable nature extends beyond crocodilians, as they often coexist peacefully with birds and turtles. However, humans pose the greatest threat, as capybaras are hunted for food in some regions, leading to the establishment of farms to protect wild populations. Despite their calm exterior, capybaras can bite if provoked, reminding us that even the most relaxed creatures have their limits.
Published: Nov 21 2025, 7 pmeznews.inA recent study suggests that body odor, particularly linked to testosterone levels, may influence perceptions of social status among men. Researchers collected sweaty T-shirts from 74 men, averaging 22 years old, and analyzed their testosterone through saliva samples. A group of 797 participants then rated the scents for perceived dominance and prestige. Findings revealed that shirts from men with higher testosterone were consistently rated as more dominant, although no correlation was found between testosterone levels and perceived prestige. Lead author Marlise Hofer emphasized the importance of smell as a social signal, noting that while scent positivity—assessed through intensity and pleasantness—did not correlate with testosterone, the perception of dominance did. This research adds to the growing body of evidence suggesting that human behavior is influenced by olfactory cues, raising questions about the existence of human pheromones. The study is published in the journal *Evolution and Human Behavior*.
Published: Nov 21 2025, 8 pmeznews.inA recent study from the University of Zurich has identified the 100 riskiest decisions people face today, revealing that the most anxiety-inducing choices revolve around employment, particularly quitting or accepting a new job. Conducted by psychologists Renato Frey and Olivia Fischer, the research surveyed 4,380 participants to gather insights on perceived risks in modern life, challenging previous assumptions that health-related decisions dominate concerns. The findings indicate that occupational risks are paramount, with nearly one-third of responses related to job changes, while health concerns accounted for only 18%. The study also highlights demographic variations in risk perception, noting that younger individuals are more inclined to view quitting a job as risky, while older participants are more cautious about accepting new positions. However, the authors caution that the results, based on a Swiss sample, may not universally apply to other cultures, suggesting the need for further comparative research.
Published: Nov 21 2025, 12 ameznews.inA curious question about whether the smell of feces or flatulence is due to actual poop molecules entering the nose has intrigued both scientists and the public alike. Dr. Karl Kruszelnicki, an Australian doctor, conducted a light-hearted experiment after a nurse inquired if her flatulence could contaminate the sterile environment of an operating theatre. Collaborating with microbiologist Luke Tennent, they tested the bacteria present in flatulence by having a participant fart into Petri dishes, both clothed and unclothed. The results showed that only the dish exposed to the naked fart contained gut bacteria, while the clothed fart did not. Kruszelnicki concluded that while farting naked near food is ill-advised, inhaling the gas from a clothed person poses no health risk. The smell of poop is attributed to gases produced in the intestines, rather than any actual fecal matter, providing some relief to those concerned about the origins of these odors.
Published: Nov 17 2025, 5 pmeznews.inOn July 1, the ATLAS (Asteroid Terrestrial-impact Last Alert System) telescope confirmed the discovery of an interstellar comet named 3I/ATLAS, previously designated A11pl3Z. This object is moving at an impressive speed of approximately 58 kilometers (36 miles) per second, nearly double that of its predecessors, ‘Oumuamua and Comet 2I/Borisov. Initial brightness observations suggest 3I/ATLAS could be around 20 kilometers in size, although further studies are needed to refine this estimate. Astronomers worldwide are currently investigating its physical properties, with the comet expected to remain visible from Earth until September before passing behind the Sun. It will re-emerge for observation in December. NASA noted that archival data from various telescopes has aided in understanding the comet's characteristics, highlighting the potential presence of around 10,000 interstellar objects within Neptune's orbit, many of which remain undetected.
Published: Nov 20 2025, 12 pmeznews.inAt Calgary Zoo, daily dental care is essential for Lobi, a male hippo whose lower canines are prone to gingivitis. To maintain his oral health, zookeepers first spray water into his mouth to remove debris before using a human-sized electric toothbrush for a thorough clean. Following this, a syringe of hydrogen peroxide is applied to keep Lobi's teeth and gums healthy, allowing him to continue his impressive pumpkin-chomping feats. In the wild, hippos benefit from a mutualistic relationship with barbels, fish that clean their teeth and skin by eating parasites and debris. However, zoo animals like Lobi lack access to such natural dental care, necessitating human intervention. Dental consultant Peter Kertesz notes that while brushing can help, diet plays a crucial role in preventing decay, with trauma being a more common issue for zoo animals than cavities, particularly those on unnatural diets.
Published: Nov 19 2025, 10 amFor the fastest, latest, not so wokest news, 'experts say' you need to visit Eznews
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