Darwin's private correspondence and notebooks reveal a detailed understanding of evolutionary processes underlying biodiversity. Despite mentioning 'Creator' in The Origin of Species, Darwin was troubled by the origin of life problem and had an advanced idea on its solution.
Researchers analyzed Y chromosome DNA from human remains on the Canary Islands to determine the origin and evolution of paternal lineages. They found a North African origin for these lineages, which declined due to European colonization and the African slave trade.
A new study by Rice University's Jones Graduate School of Business found that Chinese firms benefiting from the diversity of foreign direct investment (FDI) productivity and competitiveness. The more diverse the national origins of foreign investors in an industry, the higher the productivity of Chinese firms.
Researchers at Columbia University Irving Medical Center found a new type of adult stem cell, CARNs, in the prostate that can give rise to cancer if tumor suppressor genes are inactivated. The discovery resolves controversy over the origin of prostate cancer cells and may help develop better treatments.
Scientists have uncovered new evidence on the origin and evolution of seismogenic faults in the Nankai Trough, a region prone to massive earthquakes. The research, conducted during the NanTroSEIZE expedition, reveals that fault activity varies through time, with periods of high and low activity recorded.
Researchers at Monash University discovered that early meteorites' radioactive nuclei could have originated from a nearby giant star. The presence of these nuclei affects the evolution of planetary systems and the origin of Earth's water.
Researchers found that most obsidian flakes originated in Kamchatka, suggesting a key role in maintaining social relationships among people living in the isolated Kuril Islands. The study's findings indicate that connections with other communities were essential for survival.
Researchers at Medical College of Wisconsin published first paper describing Milwaukee's largest swine origin influenza (H1N1) outbreak in June 2009. The study identified 679 adults and children with S-OIV infection, making up 18.2% of all tested individuals.
A Kansas State University professor is studying new theories about the origin and future of life in the universe. He suggests that artificial black holes could play a part in the evolution of life and potentially spread it throughout the galaxy.
A new genus of hominoid primate, Anoiapithecus brevirostris, has been identified at a site in Spain. The fossil exhibits primitive and derived traits characteristic of great apes, shedding light on the origin of the Hominidae family.
The study compares genetic structures of Arabidopsis thaliana and Persea americana to understand how the first flowering plants evolved from non-flowering plants. Researchers found significant overlap among organ types, suggesting a genetic 'fossil' that allowed for flower transformation.
The InDevR FluChip has been shown to detect and distinguish swine-origin H1N1 from human influenza viruses with high accuracy. The assay's robust performance is attributed to its targeted M-gene sequence, which codes for the virus' matrix proteins.
Researchers constructed a nearly complete globe of Mercury using high-resolution and multispectral images, revealing its composition and origin. The study suggests that Mercury's crust formed in repeated volcanic eruptions, unlike the Moon.
The special issue of Genome Research celebrates Charles Darwin's birthday and the publication of On the Origin of Species. Researchers investigate human adaptation and evolution on a genome-wide scale, describing novel fine-scale genetic structure within and between populations worldwide.
Researchers discovered that second chromosomes in bacteria are formed from plasmids, challenging current understanding of genome evolution. The study provides a general model for how multichromosomal architectures evolved in the Rhizobiaceae family.
Scientists have discovered more support for the idea that amino acids created in space contributed to the origin of left-handed based protein life on Earth. The research found a pattern of excess left-handed isovaline in meteorites, which suggests that water played a role in its creation.
Current testosterone doping tests may fail to detect steroid abuse in athletes of different ethnicities due to varying hormone metabolism. Researchers suggest recalibrating thresholds for each ethnic group to address this issue.
Astrophysicists at Washington University in St. Louis will design and build Super-TIGER to measure the abundances of ultra-heavy galactic cosmic ray nuclei. The instrument aims to better understand the mechanism by which elements are accelerated in interstellar dust grains.
Biochemist David Deamer explores the molecular self-assembly processes that led to the first protocells nearly 4 billion years ago. He proposes a combinatorial chemistry approach to understanding how life began, suggesting complex systems of molecules assembled on early Earth.
Scientists will discuss new techniques to understand planetary formation, habitability, and potential for life. Experts will share insights on the probability of finding Earth-like planets within a few dozen light years of the sun.
Paul Davies, a renowned cosmologist, questions the conventional notion that there's only one form of life on Earth. He suggests that life might exist in unexpected places, such as extreme environments, and could be undetected due to our limited detection methods.
The AAAS plenary lecture explores the origins of evolutionary thought through the adventures of intrepid scientists Charles Darwin, Alfred Russel Wallace, and Henry W. Bates. The talk will be presented by Sean Carroll, a leading evolutionary biologist and author, who will share the stories of these pioneers who changed our view of life.
A rapidly evolving gene contributes to the origin of new species by driving an evolutionary arms race inside cells. The Nup160 and Nup96 genes, which code for gatekeepers of a cell's nucleus, have become incompatible between closely related fruit fly species.
Researchers discovered how invasive ants cooperate to form massive supercolonies, allowing them to expand territory and evade native enemies. The study reveals that these traits develop when populations grow and adapt to new habitats.
Researchers at Uppsala University shed new light on the origin of jawed vertebrates by studying the fossilized skull and jaws of Ptomacanthus anglicus, a 410-million-year-old fish. The study reveals a complex relationship between this ancient species and modern jawed vertebrates, including humans.
A team led by Southwest Research Institute (SwRI) has been selected by NASA to focus on expanding knowledge of the Moon's formation and bombardment history. The four-year project will unravel the origin of the Earth-Moon system and the early evolution of the solar system through a multidisciplinary approach.
Researchers are using DNA testing to determine the origins of medieval manuscripts, resolving issues with handwriting and dialect-based dating methods. By analyzing genetic data from parchment skins, scientists can identify similarities between manuscripts and pinpoint their time and place of origin.
Researchers led by Nancy Speck identified the location and developmental timeline of bone marrow stem cell formation in mouse embryos. Understanding this process may help manipulate embryonic stem cells to generate new blood cells for therapy.
Research found a high prevalence of gluten-sensitive enteropathy (GSE) in patients with iron deficiency anemia of unknown origin. A gluten-free diet improved anemia in GSE patients with mild duodenal lesions, suggesting GSE as a potential cause of iron-deficient anemia.
A new screening test using barium meal follow through with pneumocolon has been proposed for chronic abdominal pain of luminal origin. The test can detect both small and large bowel lesions, reducing the need for separate colonoscopy procedures.
Research suggests that autism and schizophrenia may stem from similar physical abnormalities caused by disruptions in early organogenesis, typically between 20-40 days after fertilization. This developmental stage is critical in shaping the body's development, and errors during this period can lead to various mental health disorders.
Argonne scientists found a way to induce chirality in pre-biological molecules using X-rays and magnetic fields. This mechanism could have been introduced by irradiation of molecules in the universe, potentially explaining the origin of life.
Researchers discovered glycolaldehyde, a basic sugar molecule, towards a star-forming region where habitable planets may exist. The detection suggests that the production of this key ingredient for life could be common throughout the galaxy.
The New York Center for Astrobiology will investigate the origins of life on Earth and conditions that lead to habitable planets. Researchers aim to detect evidence of current or past life on Mars, building on NASA missions.
A study by Tomislav Domazet-Lošo and Diethard Tautz reveals that most disease-associated genes originated before the first cells emerged, with only recently evolved genes showing no link to human diseases. This discovery sheds light on the evolutionary origins of genetic diseases affecting humans and other living organisms.
Researchers reanalyzed Stanley Miller's classic origin of life experiment to determine if chemical compounds could be detected using modern equipment. They found that a modern day version of the volcanic apparatus produces a wider variety of compounds, including 22 previously unidentified amino acids.
A new study analyzing historic samples from a classic origin-of-life experiment by NASA and university researchers found 22 amino acids, 10 of which were never seen before. The team discovered that volcanic eruptions could provide the necessary chemistry for life to emerge.
Research found that coronary heart disease symptoms presented in the context of stress were identified as psychogenic in origin when presented by women and organic in origin when presented by men. This study sheds light on why there is often a delay in diagnosing CHD in women, highlighting a gender bias in diagnosis and treatment.
Researchers used otolith chemistry to identify individuals from different nurseries and found that over half of juvenile bluefin tuna in North American waters were of Mediterranean origin. The study also shows that over 95% of adult bluefin tuna return to their place of origin to spawn, with critical implications for fisheries management.
Researchers discovered that HIV-1 group M strain began spreading among humans between 1884 and 1924. The study suggests urbanization played a significant role in the pandemic's emergence. A genetic analysis revealed evidence of common ancestor around 1900, indicating an earlier origin than previously thought.
Research reveals cosmic dust originates from Koronis asteroids, with analysis matching mineralogy and chemistry to chondrite meteorite samples. The study provides new insights into the earliest history of our solar system.
Researchers found that each type of cancer has distinct gene mutations that provide a 'selective advantage', driving tumor formation through evolution. This discovery improves our understanding of how evolution shapes life and lays the groundwork for new cancer treatments.
A Brown University-led research team has found evidence of water trapped in lunar volcanic glasses, suggesting it was present since the Moon's formation around 4.5 billion years ago. The discovery may shed light on the origin of water on Earth and its presence in the Moon's interior.
Researchers analyzed DNA haplotype data from Iceland's genealogical database to identify the origin of hereditary cystatin C amyloid angiopathy (HCCAA). The study found that carriers lived a normal life span for 200 years before experiencing shortened lifespans, highlighting the impact of dietary changes on the disease.
Researchers found a strong association between human herpesvirus 8 (HHV-8) infection and ketosis-prone type 2 diabetes mellitus (DM-2) in persons from sub-Saharan Africa. HHV-8 antibodies were present in 87.7% of patients with DM-2, compared to 15.1% of those without the condition.
A study of ancient Danish burial grounds found a man with Arabian origin, contradicting the myth of a pure Scandinavian race. The discovery indicates greater mobility among iron age populations and suggests that people from distant lands were absorbed into Danish communities.
A Rice University study found that 27 percent of newly appointed CEOs leave their jobs within three years, likely due to information asymmetry and poor hiring decisions. The study suggests that the origin, context, and composition of the board's nominating committee play a significant role in CEO success.
The June issue of GEOSPHERE discusses delamination models for the Columbia River Basalt Group, a USGS Great Basin Paleontological Database with 150 years of fossil data, and 3D modeling techniques in Oklahoma and Ireland. Geochemical processes also contribute to contamination in northern Mexico's Rio Conchos basin.
Researchers propose a symbiotic origin for the centrosome, a cell division component. The Alliegros' paper provides RNA evidence supporting this idea, which challenges traditional evolutionary theories.
Researchers at UCLA have solved a 40-year-old puzzle by identifying the source of intense radio waves in the Earth's upper atmosphere that control the dynamics of the Van Allen radiation belts. The chorus wave type is found to energize electrons and was initially thought unrelated to hiss.
Researchers found that some abiotic precursors to life on Earth carry 'handedness' in a larger number than previously thought. The discovery was made possible by the study of an exceptionally pristine meteorite, which revealed molecular asymmetry in extraterrestrial chemistry.
A study by Alysha Heimberg and colleagues found that microRNAs, previously considered 'junk DNA', are diverse in primitive vertebrates like sharks and lampreys, but less common in invertebrates. This discovery suggests that microRNAs played a crucial role in the evolution of complex organs unique to vertebrates.
Researchers at Dartmouth College have discovered that microRNAs played a crucial role in the emergence of vertebrates, with diverse regulatory mechanisms driving genome assembly. The study's findings suggest that these tiny molecules were responsible for the origin of unique organs such as the liver, pancreas, and brain.
Researchers led by Dr. Shaohua Xu propose a new theory on the origin of Alzheimer's Disease, suggesting that abnormal tau protein molecules form tangled fibers that accumulate and kill brain cells. The three-step process involves spherical clusters, linear chains, and uniform filaments.
Researchers from IRD, CNRS, and Universities worldwide studied oxygen isotope compositions to identify rubies' sources. They found 62% came from mantle origin and 20% from deep continental crust, improving prospecting strategies for these precious stones.
Researchers aim to develop an instrument that can reveal crucial data about the nature and origin of cosmic rays. Cerenkov radiation, emitted when particles travel faster than light through the atmosphere, holds key to understanding these enigmatic particles.
The American Academy of Sleep Medicine has updated its practice parameters for the treatment of narcolepsy and other central hypersomnias. The guidelines recommend a comprehensive approach to managing symptoms, including modafinil, sodium oxybate, and tricyclic antidepressants. Regular follow-up with healthcare providers is crucial to ...
Recent observations from NASA and Japanese X-ray observatories have helped clarify the origin of cosmic rays. The study, published in Nature, suggests that magnetic fields in supernova remnants are stronger than previously thought, enabling them to accelerate charged particles to enormous energies.
University of Missouri-Columbia researcher Rainer Glaser presents a novel origin-of-life theory suggesting that essential molecule adenine originated from interstellar dust clouds. The presence of highly concentrated hydrogen cyanide (HCN) in these clouds could indicate the existence of adenine, which is crucial for life on Earth.
The adult mammalian lymphatic vasculature is derived from embryonic lymph sacs and has been shown to originate from venous endothelial cells using genetically modified mice. Understanding this origin is crucial for preventing, diagnosing, and curing lymphatic disorders.