Articles tagged with Evolution
A study published in PNAS found that 70 million years ago, primates' ancestors mostly lived in pairs, with only 15% opting for solitary lifestyles. This flexible pair-living ancestor likely offered benefits such as easier reproduction and thermoregulation.
A recent study suggests that many nocturnal Strepsirrhines live in pairs of males and females, challenging the long-held assumption that these primates are solitary. Researchers found that pair-living was the most common social organization among ancestors 70 million years ago.
Researchers have found evidence that Nanotyrannus lancensis is a separate species from Tyrannosaurus rex, with narrower jaws, longer legs, and bigger arms. The new analysis suggests these animals were nearly full-grown when they died, with estimates suggesting they reached 900-1500 kilograms and five metres in size.
A new study by University of Maine researchers reveals that human evolution's core processes might prevent humans from resolving global environmental problems like climate change. The study found that cultural adaptation to the environment, which has driven human evolution, accelerates due to a positive feedback process, making it chal...
Researchers analyzed Aqp10s in eight bony vertebrate species to understand the evolutionary timeline of diminished boric acid and urea transportation. The study found that Aqp10.2 in ray-finned fishes restricts urea and boric acid passage, suggesting a loss of solute transport through evolution.
A new hypothesis suggests that fermentation of cached food provided a more accessible form of nourishment, fueling the growth of larger brains in human ancestors. This idea is supported by the fact that the human large intestine is proportionally smaller than other primates and fermented foods are found across cultures.
Researchers have discovered lipid fossils in ancient rocks, providing clues about the evolution of life. The findings suggest that a shift in animal feeding strategies occurred around 1.6 billion years ago, with some species abandoning phytosterol production as they obtained this nutrient from algae.
Researchers examined venom genes in bees and other hymenopteran taxa using comparative genomics. They found that 12 'families' of peptides and proteins were present in all analyzed hymenopterans, indicating a common ancestor possessed these genes. This suggests that Hymenoptera insects are venomous as an entire group.
Researchers found that skunks with varied fur colors, such as all-black or white individuals, were more common in areas with low mammalian predator density. This suggests that relaxed selection pressures led to the evolution of signal conformity, resulting in similar warning signals across species.
Researchers recreated ancient seawater to study nutrient availability, finding a preference for metals like manganese and molybdenum. Greenalite formation removed zinc, copper, and vanadium from seawater, matching the metal choices of early lifeforms.
A new landmark study identifies 14 evolutionary traps that human societies are at risk of getting stuck in, including global climate tipping points, misaligned AI, and chemical pollution. To avoid these dead ends, the researchers emphasize the need for collective human agency and design settings where it can flourish.
A new study has found that a relatively ancient shark species, the smalltooth sand tiger, exhibits anatomic features suggesting regional endothermy. This discovery suggests there may be more warm-blooded sharks than previously believed, and potentially poses significant conservation implications for these species.
Researchers have successfully engineered a soft robotic replica of a 450-million-year-old marine organism, pleurocystitid, to better understand its biomechanical factors and locomotion. The study introduces the field of Paleobionics, which uses Softbotics to explore evolution and animal design.
Researchers found that chimpanzees are more likely to climb hills when heading towards contested borders, where they can quietly rest and hear distant sounds of rival groups. This behavior suggests that chimpanzees gauge the distance of rivals and act accordingly to avoid costly fights.
Researchers found gene signatures associated with head development in juvenile sea stars, but expression of torso and tail genes were largely missing. The study suggests that over evolutionary time, sea stars lost their bodies to become only heads.
Researchers used genetic and molecular tools to create a 3D atlas of gene expression in starfish, revealing that the "head" is distributed across each arm and center. The study provides insight into the evolution of echinoderms, including sea stars, which have a unique body plan compared to humans.
Researchers discovered that D. sechellia's nervous system has evolved to tolerate the toxins in noni fatty acids, allowing it to prefer and lay eggs on the fruit. The study reveals differences in taste sensitivities among three closely related fly species, providing insights into how insects adapt to host plants.
The new species of mosasaur, named after the Norse sea serpent Jormungandr, is estimated to be around 24 feet long and has a mosaic of features seen in two iconic mosasaurs. The discovery sheds light on the evolutionary history of these aquatic lizards and provides new insights into their relationships with other reptiles.
A team of researchers from UMaine and UVM have conducted the first-ever study of cultural adaptation to climate change in US crops. They found that farmers are already adapting their practices to better match crops to recent changes in climate, with some regions showing significant changes in crop selection.
Two bee species thought to be distinct are found to be the same, males and females of a single species, using DNA sequencing. The study uses barcoding to identify the species, which is crucial for understanding conservation needs.
Researchers studied over 100 noctilionoid bat species, finding that different dietary types drove modifications in tooth number, size, shape, and position. For instance, fruit-eating bats have shorter jaws with reduced middle premolars, while nectar-feeders have longer jaws with room for more teeth.
Researchers discovered a wide range of organisms, including microbes and humans, exhibit similar movement patterns to navigate their surroundings. These patterns are thought to be linked to uncertainty management in the brain.
Researchers from Bologna, Siena, and Haifa will investigate Neanderthal extinction in Eastern and Southeastern Europe and Western and Central Asia. The project aims to shed light on the chain of events that led to their disappearance.
A team of palaeontologists has identified the oldest-known mega-predatory pliosaur, Lorrainosaurus, from 170-million-year-old fossils found in north-eastern France. The discovery reveals a new understanding of marine reptile evolution and ecosystem shifts during the Early-to-Middle Jurassic boundary.
A nearly intact fossilized bat skull discovered in a 50-million-year-old cave has provided crucial insights into the evolution of bats and their use of echolocation. The find, part of an analysis published in Current Biology, suggests that early bats may have used a form of echolocation similar to that employed by modern species.
A team of scientists and philosophers identifies a new law of nature that governs the evolution of complex systems, including plants, animals, stars, and minerals. The law states that complex systems evolve to states of greater patterning, diversity, and complexity, regardless of whether they are living or nonliving.
Researchers discovered early Cambrian microfossils preserving introvert musculature of cycloneuralians, a group of animals that include roundworms and horsehair worms. The preserved musculature consists of four groups of muscles, differing from basal animals in terms of topology.
A new study by James Stroud at Georgia Tech and Jonathan Losos at Washington University in St. Louis found that natural selection varies massively through time among four different species of anoles living together on a small island. Despite this variation, the species remained remarkably similar across the entire time period.
A long-term study by Georgia Tech's James Stroud found that natural selection varies massively through time, canceling out any stabilizing effect. Species remained remarkably similar across the entire three-year period, contradicting the idea of constant evolution.
A study by Annika Avedik and Marcus Clauss found that hippos' prominent tusks and wide gaping mouths restrict grinding jaw movements, making chewing inefficient. This limitation may have restricted common hippos to a semi-aquatic lifestyle.
A team of paleontologists has discovered the oldest record of sea turtle DNA in a fossil shell from Panama's Caribbean coast. The findings, published in Journal of Vertebrate Paleontology, date back approximately 6 million years to the upper Miocene Epoch.
Researchers found a correlation between skeleton complexity and bird diversity, with less complex birds having higher species richness. Birds with more complex skeletons are more ecologically specialised, occupying fewer habitats and foraging in fewer ways, making them more vulnerable to environmental changes.
Caribbean box jellyfish have demonstrated complex learning capabilities, including associative learning and memory formation, despite having only one thousand nerve cells. This discovery sheds new light on the evolutionary success of jellyfish and raises questions about the universality of advanced learning mechanisms in animals.
A 455-million-year-old fossil fish provides a new perspective on how vertebrates evolved to protect their brains. The ancient jawless fish has a unique skull with separate cartilages encasing the brain, filling a gap in the evolutionary history of the vertebrate skull.
A new study has found that bats' extraordinary ability to host and survive infections may be linked to their low cancer rates. Researchers sequenced the genomes of two bat species and compared them to other mammals, discovering genetic adaptations that allow bats to tolerate viral infections.
Researchers found that specialized placozoan cells share similarities with neurons and may have given rise to them in more complex animals. The study sheds light on the evolution of neurons, focusing on the unique characteristics of these ancient creatures.
A new study reveals that long-lived lakes played a crucial role in the evolutionary history of freshwater snails. These ancient ecosystems allowed species to 'experiment' over millions of years, resulting in unique morphological changes and special ecological adaptations.
A recent study classified clubmosses into seven primary clades and nineteen genera, with twelve newly described genera. This classification offers advantages for analysis, communication, and conservation of these ancient vascular plants.
A new study by Flinders University researchers has discovered an ancient relative of the koala, Lumakoala blackae, which lived around 25 million years ago. The discovery fills a 30-million-year-old gap in Australian marsupial evolution and provides insights into the early evolution of diprotodontian mammals.
A new species, Fujianvenator prodigiosus, exhibits a bizarre assembly of morphologies shared with other avialans, troodontids, and dromaeosaurids. The discovery provides insight into the early evolution of birds and their ecological adaptations.
A study by Dartmouth researchers reveals that human shoulders and elbows evolved to facilitate 'downclimbing' - the process of descending from trees without dying. This adaptation allowed early humans to navigate their environment safely, gathering food and deploying tools for hunting and defense.
Researchers found that over 80% of the bamboo's flowering culms did not produce viable seeds, indicating a lack of sexual regeneration via germination. This may lead to widespread ecological changes and loss of a valuable resource.
Research confirms the EIH hypothesis on a global scale using extensive data, showing that plants from vast, species-rich regions are most successful at naturalizing. Additionally, economic plants from these regions also show similar patterns of invasion and cultivation, suggesting interactions between biological and cultural systems.
A team of researchers from Göttingen University has identified seven new species of leaf insects, showcasing their unique camouflage abilities. The discovery highlights the importance of protecting these distinct species from extinction.
Researchers found that mothers' social environment predicts their sons' reproductive tactics, such as sneaking or guarding females. A biased female sex ratio in the maternal generation leads to increased male-male competition, resulting in more males and intense mating behaviors.
Two new species of primitive carnivorous dinosaurs, belonging to the Abelisauridae family, have been discovered in Morocco. The findings suggest that dinosaurs thrived in North Africa until their mass extinction by an asteroid 66 million years ago, providing a diverse picture of African dinosaurs from the end of the age of dinosaurs.
The invasive orange pore fungus has won the third BMC Ecology and Evolution image competition, highlighting its potential threats to Australian ecosystems. The winning image depicts bright orange fruiting bodies growing on deadwood in the Australian rainforest.
Proeboscideans evolved tooth changes in response to vegetation changes and climate change in East Africa. The earliest true elephants developed highly specialized high-crowned molar teeth around 7 million years ago, adapted to grass-rich diets.
Researchers at NUS and Imperial College London have discovered a new way bacteria share genes, enabling rapid evolution. Lateral cotransduction enables SaPIs to transfer themselves intact with bacterial DNA, making them potent transducing agents.
A study analyzing genomic data from 34 fossils, including the famous sambaquis shell mounds, found that Luzio, São Paulo's oldest skeleton, was a descendant of the ancestral population that settled the Americas at least 16,000 years ago. The research also revealed differences between coastal and inland communities, suggesting two disti...
Researchers found that fork-tailed drongos use unique egg 'signatures' to identify cuckoo eggs, rejecting 93.7% of 'forgeries'. This defence mechanism may help explain why African cuckoos remain common in Africa despite high mortality rates among young birds.
Researchers discovered unprecedented snake venom resistance in caecilians, highlighting the species' ability to evolve under severe selective pressure. The study found that caecilians deployed three distinct biological methods to resist elapid snake venom, including changing receptor shape and deploying an electromagnetic 'weapon'.
A team of scientists has identified an orphan gene in seahorses linked to the unique function of their brood pouch. The proline-glycine rich (pgrich) gene is expressed in flame cone cells, which are distinctive epithelial cells on the outer epithelium of the brood pouch.
A new species of ancient alligator, Alligator munensis, is described from a fossilized skull in Thailand. The species is closely related to the Chinese alligator and has unique features such as a broad snout and large tooth sockets, suggesting it ate hard-shelled prey.
Researchers found that the annulated sea snake possesses four intact copies of the opsin gene SWS1, two with ancestral ultraviolet sensitivity and two with evolved sensitivity to longer wavelengths. This suggests that sea snakes have regained color discrimination to distinguish predators, prey, and mates in their marine habitats.
A new study found that larger group size and polygynous mating systems are linked to deeper male voices in primates. This sex difference is thought to influence mating success through attracting mates or intimidating competitors.
Researchers reveal that climate adaptations played a crucial role in shaping the uneven distribution of Asian and Australian faunal representatives. The tropical climate of Indonesian islands favored species with wide climatic tolerances, allowing them to colonize New Guinea and northern Australia.
A 500-million-year-old tunicate fossil named Megasiphon thylakos has provided unprecedented insights into the early evolutionary history of this enigmatic group. The fossil's unique morphology and soft tissue preservation suggest that ancestral tunicates were stationary, filter-feeding adults with a non-moving lifestyle.
A team of researchers at Indiana University created a synthetic cell with only 493 genes, essential for life. The cell evolved rapidly over 300 days, adapting to its environment and recovering fitness lost due to genome streamlining.
Scientists at ETH Zurich and University of Geneva investigate how concentrated urea solutions react to ionizing radiation, revealing fast proton transfer that may have led to emergence of RNA and DNA. The new method allows for high temporal resolution observations of chemical reactions in liquids, relevant to understanding life's origins.