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The genomic journey of modern and archaic humans may be older than we thought
Research conducted at the Department of Biology, University of Padova, has identified critical genomic milestones in the evolution of Homo sapiens, including key chromosomal rearrangements and specific gene variants that contributed to the development of current modern human traits.
Heterogeneous host populations drive evolution of more virulent pathogens, modeling study shows
The evolution of pathogens has received attention in a wide range of scientific fields, such as epidemiology, demography, and evolutionary ecology. Understanding pathogen evolution is particularly urgent for rapidly evolving pathogens, such as SARS-CoV-2, which has spread globally since 2019.
Sea snakes regain advanced color vision, recovering a complex trait once lost to evolutionary time
Nine species of sea snakes have now been identified as having regained the genetic requirements for advanced color vision, demonstrating that once a complex trait has been lost to evolutionary time, it may be regained in some way.
Simulations of hominin Lucy help show how long distance running evolved in modern humans
A team of natural scientists, musculoskeletal specialists, and evolutionary biologists affiliated with several institutions in the U.K., working with a colleague from the Netherlands, has found via simulations, that the famous early hominin Lucy, could run upright, but not nearly as quickly as modern humans.
Could NZ's two kākā subspecies actually be remnants of a more diverse species? Here's why we need to know
As many Wellingtonians will know, kākā can be trouble. New Zealand's pesky forest parrots have expanded throughout New Zealand's capital city since they were reintroduced 22 years ago and they are not averse to "modifying" people's homes to build nests in roof spaces.
Extended chart of life shows ancient species may have evolved slower and lasted longer
If all the world's a stage and all the species merely players, then their exits and entrances can be found in the rock record. Fossilized skeletons and shells clearly show how evolution and extinction unfolded over the past half a billion years, but a Virginia Tech analysis extends the chart of life to nearly 2 billion years ago. The study is published in the journal Science.
Comprehensive analysis reveals hidden genomic evolution of brown algae
Covering over 70% of Earth's surface, the oceans are home to countless life forms that maintain ecological balance and support human well-being. Among these, brown algae (Phaeophyceae) play a crucial role in sustaining coastal habitats, supporting marine biodiversity, and combating climate change through carbon capture. While they have long captured the interest of the scientific world, the genomic and evolutionary history of these organisms has remained largely unexplored.
How a giant prehistoric elephant skull helped untangle an evolutionary mystery
About 400,000 years ago, early humans in Europe, Asia and Africa lived alongside giant straight-tusked elephants, far bigger than their modern-day cousins. Their evolution has long been a mystery to paleontologists, but an extraordinary, enormous and near-complete skull is helping us uncover an obscure episode in the evolutionary history of these prehistoric megaherbivores.
Were Neanderthals cold-adapted or were they just ready for anything? Ribcage reconstruction may hold the answer
Researchers at the Department of Paleobiology, Museo Nacional de Ciencias Naturales in Madrid report that analysis of a Neanderthal ribcage from a cave in Iraq exhibits a "bell-shaped" thorax configuration typical of Neanderthals elsewhere, differing from that of modern humans.
Ferns' ability to evolve 'backward' offers insights into the meandering path of evolution
Imagine a photograph of your great-grandparents, grandparents and parents side by side. You'd see a resemblance, but each generation would look distinct from its predecessors. This is the process of evolution in its simplest form: descent with modification.
Unidentified jumping bristletail exhibits extreme specialization in male external genitalia
Researchers at Meijo University and University of Tsukuba collected and taxonomically re-examined numerous enigmatic jumping bristletails. These were first reported 75 years ago. The team observed extreme specialization in the external genitalia of the males and discovered that this species belongs to a unique group, potentially representing a primitive state leading to "copulation" during evolutionary development. The study is published in Zootaxa.
Rapid evolution: African clawed frog sex determination challenges prevailing theory
Researchers at McMaster University have uncovered unexpected diversity in the genetic processes that determine the sex of the African clawed frog, a significant discovery in what was already one of the most widely studied amphibians in the world.
Twins were the norm for our ancient primate ancestors—one baby at a time had evolutionary advantages
Twins have been rare in human history and for that reason can seem special. Many cultures associate twins with health and vitality, while others see them as a philosophical reminder of the duality of life and death, good and evil. Some famous twins are credited with the birth of nations, others are described as deities.
Closest relative of 'magic mushroom' discovered in Africa
A team of biologists, mycologists and microbiologists in the U.S., South Africa and Zimbabwe reports that a species of mushroom growing in parts of Africa is the closest relative of Psilocybe cubensis, the most widespread hallucinogenic mushroom known to science.
Completing the 'timetree' of primates: A new way to map the evolutionary history of life on Earth
In a new article published in Frontiers in Bioinformatics, biologists Dr. Jack M Craig, Dr. Blair Hedges, and Dr. Sudhir Kumar, all at Temple University, have built an evolutionary tree that encompasses 455 primates, every species for which genetic data are available. The tree, the most complete of its kind, shows the evolutionary timescale of the whole order of primates, including monkeys, apes, lemurs, lorises, and galagos.
Uncovering the evolutionary origins of the hepatitis E virus
An international team of virologists, mammalian ecologists and zoologists has uncovered the evolutionary origins of the hepatitis E virus. In their study, published in the Proceedings of the National Academy of Sciences, the group analyzed genomic data for multiple viral hosts.
Barn swallow research offers real-time insight on how new species form
Beauty is in the eye of the beholder—even if that beholder is a barn swallow. Depending on where the birds live, some of them may favor mates with a paler chest color while others find a redder chest more attractive. The difference in what these birds prefer when it comes to choosing a mate is helping scientists unlock one of biology's greatest mysteries: How do new species originate?
New insights into the evolution and paleoecology of mosasaurs
Mosasaurs are extinct marine lizards, spectacular examples of which were first discovered in 1766 near Maastricht in the Netherlands, fueling the rise of the field of vertebrate paleontology. Paleontologist Michael Polcyn presented the most comprehensive study to date on the early evolution and ecology of these extinct marine reptiles.
Enzymes evolved mix-and-match characteristics to shape nitrogen metabolism diversity across the planet
To boost crops more efficiently in the future, the evolutionary past may hold key insights. The way that plants process nutrients has a rich back story—they rely on enzymes that have been evolving for billions of years. However, these enzymes are often loosely understood, leaving potential targets for crop engineering untouched.
Neuronal adaptations shed light on anglerfish hunting behavior
Characterized by their unique adaptations to extreme environments, anglerfish are known for using lures to attract prey. Researchers at Nagoya University in Japan have discovered in frogfish (a subgroup of anglerfish) a specialized motor neuron population in the first dorsal fin used for this "fishing" behavior.
A new species of flying reptile reshuffles the timeline of pterosaur evolution
About 230 million years ago, almost 80 million years before the first bird appeared, their distantly related cousins, the pterosaurs took to the sky, as the first group of active fliers among the vertebrates. Pterosaurs developed active, flapping flight with the help of a wing membrane, which was mainly spanned by the strongly elongated fourth finger of the hand.
Chloroplasts' ancient origins: Organelles may have emerged as energy producers before switching to carbon assimilation
One of the most momentous events in the history of life involved endosymbiosis—a process by which one organism engulfed another and, instead of ingesting it, incorporated its DNA and functions into itself.
Flagella-free survival: How bacteria evolve by shedding their 'wheels'
A research group has discovered an interesting way that bacteria adapt to their environment. Their study, published in Microbiological Research, reveals that bacteria can evolve by losing their flagella, the structures responsible for movement.
Morphology study highlights diverse jaw evolution in lizards and snakes
A University of Bristol study has shed light on how lizards and snakes—the most diverse group of land vertebrates with nearly 12,000 species—have evolved remarkably varied jaw shapes, driving their extraordinary ecological success.
Centromeres could be 'hotspots' for evolutionary innovation
New research reveals that centromeres, which are responsible for proper cell division, can rapidly reorganize over short time scales. Biologists at the University of Rochester are calling a discovery they made in a mysterious region of the chromosome known as the centromere a potential game-changer in the field of chromosome biology.
A microRNA solves an evolutionary mystery of butterfly and moth wing coloration
Lepidopterans (butterflies and moths) exhibit a splendid diversity of wing color patterns, and many species display black and white, or dark and bright, wing color pattern variants associated with the presence and absence of melanin. Many of these wing color pattern variants are textbook examples of natural selection and evolution.
Scientists identify mutation that could facilitate H5N1 bird flu virus infection and potential transmission in humans
Avian influenza viruses typically require several mutations to adapt and spread among humans, but what happens when just one change can increase the risk of becoming a pandemic virus?
That's no straw: Hummingbirds evolved surprisingly flexible bills to help them drink nectar
Hummingbird bills—their long, thin beaks—look a little like drinking straws. The frenetic speed at which they get nectar out of flowers and backyard feeders may give the impression that the bills act as straws, too. But new research shows just how little water, or nectar, that comparison holds.
Chimpanzees use different types of memory to find insects hidden underground, study finds
Chimpanzees are the animals with the most complex memory, apart from humans. They remember where and when ripe fruits are available, and use this information to decide which trees they will visit and even where they will sleep in order to eat these fruits first thing in the morning. However, the cognitive strategies they use to find foods of animal origin rather than plant origin are not yet well understood.
Study shows chimpanzees perform the same complex behaviors that have brought humans success
A new study suggests that the fundamental abilities underlying human language and technological culture may have evolved before humans and apes diverged millions of years ago. The findings were published 5 December 2024 in the journal PeerJ.