Researchers at Scripps Institute find a protein called LexA promotes mutations in bacteria, enabling them to evolve resistance to antibiotics. By inhibiting this protein, the bacteria's ability to evolve can be halted, potentially prolonging the potency of existing antibiotics.
Researchers develop method to modify existing proteins by adding intermediate functions followed by stepwise directed evolution, creating new protein functions in a couple of months. The approach has potential applications in therapeutics and other fields.
A UF paleontologist's research sheds new light on horse evolution, showing that size, diet, and range depended on geography and climate. The study's findings contradict previous notions of a simple evolutionary story.
Researchers discovered human brain evolution accelerated due to intense selection favoring complex cognitive abilities. Brain-related genes evolved faster in humans and macaques compared to rats and mice. Many genes, including those controlling brain size and behavior, were impacted by this selective process.
A study found that genes controlling brain development and function evolved significantly faster in the human lineage than in other species. This suggests that strong selective forces favored larger and more complex brains, leading to a dramatic speeding up of evolution.
The discovery suggests that strong selection for running fueled the growth of the human brain by relaxing constraints on protein and fat acquisition. Running has substantially shaped human evolution, with features like detached shoulders, springy tendons, and well-defined buttocks emerging to enable efficient long-distance running.
A study by Dr. Richard Palmer challenges the classical Darwinian theory, suggesting that environment plays a crucial role in creating differences and variations in species. The research found that variations without genetic basis are common and important for evolution, especially in asymmetric forms.
Researchers at EMBL have discovered that the light-sensitive cells in our eyes, rods and cones, originated from an ancient population of light-sensitive cells located in the brain. These brain cells were later recruited for vision, leading to the evolution of the human eye.
Researchers find that transposable elements, called Pack-MULEs, copy themselves prolifically and rearrange genes, making them newly discovered players in evolution. The discovery elevates these little-considered elements to potentially major players in the process of evolution.
Researchers find that simple vesicles with genetic material grow and compete for resources, challenging current theory on cell evolution. The study suggests that the presence of RNA is key to driving cellular growth and competition.
Researchers have found that the threespine stickleback fish has a genetic sex-determination system similar to other vertebrates, with females having XX chromosomes and males having XY. The study provides evidence for the early formation of sex chromosomes in this species, offering insights into the evolution of sex chromosomes.
CU researchers report consistent pattern in deuterium abundance, suggesting smaller amount of chemical evolution and higher infall of near primordial gas to the Milky Way galaxy. The findings provide a better understanding of galactic chemical evolution and its impact on the formation of stars, planets, and life.
The new 'Understanding Evolution' Web site offers a one-stop-shop for science teachers, providing practical examples and strategies for teaching evolution. The site features Evolution 101, a primer on evolutionary theory, as well as discussions on the nature of science and the history of evolutionary thought.
Chiu presented her research on correlating gene changes with limb structure, a topic of interest to paleoanthropologists. By studying the mouse, she found that significant developmental differences are due to changes in gene regulation.
Research integrating genetics and paleontology aims to resolve human evolution debates by combining fossil records with genetic data. A recent study on baboon teeth shows that enamel thickness can vary widely within a population, challenging long-held assumptions.
John Staver, a K-State science education professor, argues that intelligent design cannot be considered a scientific theory due to the absence of empirical evidence and rigorous testing. He emphasizes the importance of scientific experimentation and peer review in establishing new scientific ideas.
The intelligent design movement argues that life's complexity demands a knowing designer, potentially altering the way science is taught in schools. While differing from scientific creationism, its agenda to weaken or eliminate evolution's teaching in public classrooms remains ambitious.
A study led by Bruce Lahn found that the Abnormal Spindle-Like Microcephaly Associated (ASPM) gene shows strong evidence of accelerated evolutionary changes in the primate lineage leading to humans. These changes are most prominent after humans parted ways from chimpanzees, suggesting a possible key role for ASPM in human brain evolution.
Research finds that snake venom evolved only once in evolution, around 60 million years ago, and is now found in virtually all advanced snakes. A study of over 2,000 snakes from around the world has discovered that many non-venomous species possess complex venoms.
A recent UCLA study found that Caribbean island lizards share genetic material due to ocean currents, which carry them from one island to another. This challenges the long-held assumption that species on separate islands evolve independently.
A symposium explores how climate change influenced brain development, tool use, and migration patterns of early humans. Leading scientists discuss the impact of glacial periods on human populations, with findings suggesting that water availability played a critical role in shaping human evolution.
Researchers will use single-celled social amoeba Dictyostelium discoideum to uncover genes and molecular pathways underlying sociality. The project aims to understand how social forces create evolutionary pressures and control opportunistic behavior.
A new approach to analyzing bacterial genomes has enabled the reconstruction of evolutionary events and the diversification of bacterial species over a billion years. This method uses gene indicators to chart the structure and substance of genomes, providing valuable insights into genomic evolution.
In a laboratory experiment using rotifers and algae in chemostats, rapid evolution allowed prey to adapt and outnumber their predators. This phenomenon, predicted by computer models, demonstrates how evolution can play a crucial role in ecological dynamics and could have implications for understanding diseases like HIV.
Researchers discovered rapid evolution in the white-footed mouse population, with significant changes in gene sequence frequencies over three 50-year intervals. The findings suggest that humans may be a cause of this rapid evolution, and challenge current phylogenetic and phylogeographic methodology.
A considerable proportion of college graduates are unfamiliar with evolutionary principles, a study suggests. Researchers found that students with extensive science courses still exhibit similar deficits in understanding evolution.
A new cellular evolution theory challenges Darwinian assumptions by emphasizing horizontal gene transfer as the driving force behind cellular life's evolution. This process allowed for the acquisition of alien cellular components, including genes and proteins, to promote evolutionary change.
Researchers create model that accurately reproduces natural evolution and predicts how bacteria will become resistant to antibiotics. The model shows promise as a possible tool for creating new drugs that can evade bacterial adaptation.
The new UI Center for Research on Processes in Evolution will investigate the evolution of drug resistance in microbes and determine how specific viruses choose their hosts. This research could help identify patterns in evolution and constraints, shedding light on nature's workings and future disease threats.
A new theory proposes that modern birds' evolution of flight was driven by their parenting skills, which led them to settle in trees for better protection. This contradicts two leading theories on avian flight and is supported by evidence from Archaeopteryx fossils.
Researchers at Stanford Medicine developed a system to study genetics and evolution in natural populations using the three-spine stickleback fish. They found parallels between laboratory genetics and evolutionary changes in the fish, suggesting that evolution can occur through large-effect gene changes.
A team of researchers analyzed a rare, well-preserved meteorite found in Canada, revealing organic compounds with similarities to other known carbonaceous chondrites. The study suggests that the Tagish Lake Meteorite may represent an early stage in the evolution of complex carbon compounds in space.
A team of researchers has discovered a new species of early bird, Apsaravis ukhaana, in Mongolia, which sheds light on the evolution of modern birds. The fossil, dated to 80 million years ago, reveals that early modern birds were not restricted to near-shore environments and were instead small terrestrial flyers.
According to a report by Lawrence S. Lerner, 31 states handle evolution adequately, but only nine explicitly cover human evolution and another nine do so by implication. The remaining 19 states receive poor grades for teaching evolution, with some even avoiding the term altogether.
Researchers analyzed Precambrian sedimentary rocks to track the evolution of oxygen and ozone in the early atmosphere. The study found a 'profound change' in chemical reactions involving sulfur, indicating limited free oxygen and a global signature.
Researchers found that genes involved in male reproductive processes, such as sperm production and morphology, have evolved at a faster rate than non-sexual genes in humans. This accelerated evolution is attributed to sexual pressure, including competition for mating success and internal sperm competition.
Recent dinosaur fossil finds suggest dinosaurs developed new abilities through opportunistic approach, rather than gradual adaptation. The breakup of supercontinent Pangaea led to regional extinctions and replacements by other species, shaping the evolution of new species.
A new 400-million-year-old primitive shark relative from Bolivia named Pucapampella has been discovered, contradicting the belief that chondrichthyans are primitive due to their jaw characteristics. The fossil suggests that modern shark jaws are an advanced characteristic than the jaws of bony fish.
Researchers Caro-Beth Stewart and Todd Disotell propose a new model for the evolution of humans and apes, suggesting that the common ancestor evolved in Asia rather than Africa. This theory requires only two hominoid migration events, marking a significant departure from traditional views.
A study of wild guppies in Trinidad found they can evolve between 10,000 to 10 million times faster than the fossil record. This suggests short-term experiments can provide insight into evolutionary changes over millions of years.