Articles tagged with World Population
A team of international researchers has developed a globally-applicable ethical code for ancient human DNA research, aiming to address social and cultural implications. The code proposes cooperation with stakeholders, minimal damage to human remains, and respect for indigenous communities' perspectives.
Researchers have discovered that ulvan extracted from marine algae can prevent the infection of cells with the Corona virus. The study suggests that this cheap and accessible natural material may help solve the global spread of the pandemic in developing countries without access to vaccines.
The Zinc Status Index is a new evaluation method developed by Cornell food scientists that uses biomarkers to calculate the physiological status of a subject. It aims to provide a comprehensive assessment tool for zinc deficiency, which affects over 1 billion people worldwide.
A recent study by McGill University researchers found that hunter-gatherer societies were limited by the seasonal availability of food, with groups in short-growing seasons requiring a high percentage of meat in their diets. This finding is supported by ethnographic observations and simulations using a mathematical model.
Exposure to artificial light at night impairs crickets' activity cycles, disrupting their nocturnal chirping and potentially affecting reproduction. The study, conducted by researchers at Tel Aviv University and the Open University, highlights the need to reduce artificial light pollution to protect environmental behaviors.
A study by Massachusetts General Hospital found that prioritizing prompt procurement, distribution, and vaccination pace can maximize public health benefits and economic efficiency. Meeting vaccination targets of 67% or 80% of the population can significantly reduce infections and deaths while minimizing healthcare costs.
A new analysis spanning 10,000 years of history and ten major world regions found that world population size, major technological advances, and geographical connectivity are key drivers of military technology evolution. The study's methodology employed a resource called Seshat: Global History Databank to empirically test prior hypotheses.
A high-resolution map of Arab and Middle Eastern population genetics has been unveiled, providing new insights into human history in the region. The study revealed that ancient populations in the Arabian Peninsula played a central role in early human migration out of Africa.
A new study published in The Lancet Digital Health found a link between screen time and myopia in children and young adults. High levels of smart device exposure increased the risk of short-sightedness by up to 80%, according to researchers at Anglia Ruskin University.
New estimates suggest nearly half (47%) of the global population has limited or no access to key tests and services for diagnosing common diseases. The Lancet Commission on Diagnostics calls for urgent investment and training to improve access to testing in primary care, especially point-of-care testing.
West Virginia University researchers aim to create better connections with underserved populations to the blue economy, which defines sustainable use of ocean resources. They will analyze data and explore ways to package it in a way that encourages these traditionally underserved groups to utilize the blue economy.
A new study reviews sustainability standards for crop and livestock production, finding moderate positive effects on the environment through reduced agrichemical use. However, economic benefits vary by region and standard, and assessments are complicated. The study also raises concerns about labor practices and inequalities in the rura...
A new study found that COVID-19 led to a significant decline in births across high-income countries, with the strongest declines observed in southern Europe, while northern Europe showed little impact. The researchers attribute this variation to differences in economic disruption and social support policies.
A new study by the ICTA-UAB establishes that populations of hunter-gatherer groups with strong seasonal dependence on meat had fewer people per square kilometer than those relying on abundant plant foods. This result is based on a complex set of calculations showing how diet composition influenced population density.
A University of Massachusetts Amherst scientist suggests that rising social stress may contribute to the projected global population decline starting in 2064. Stress from social media and other social interactions may be leading to changes in reproductive behavior and physiology, resulting in decreased reproduction rates.
Researchers identify commercialized Membrane Distillation as a green solution for clean, drinkable water. The technique overcomes Reverse Osmosis limitations and provides safe drinking water while managing brines, keeping the environment safe.
A new study reveals that deforestation and population growth have greatly increased landslide risk in the Kivu Rift, leading to thousands of fatalities each year. The research, conducted over six decades, shows that smallholder agriculture and mining activities also contribute to landslides.
Researchers estimated a significant increase in global mesothelioma cases and deaths from 1990 to 2017. The study found that asbestos exposure remains a well-established risk factor for the disease.
Researchers project a further decline in excess male births in countries like China and India, but warn of a surplus of young men globally, posing social and economic challenges. A global loss of 22 million female births could occur by 2100 if all at-risk countries are included in projections.
Researchers found that primary care physician and practice characteristics were not significantly associated with rates of unplanned hospitalizations in New Zealand. However, in the Netherlands sample, larger practices and those staffed with a practice nurse had higher admission rates. These findings suggest that primary health care st...
New research reveals that low-income neighborhoods and minority communities experience significantly more urban heat than their wealthier counterparts. The study, published in Earth's Future, found that land surface temperatures in these communities can be up to 4 degrees Celsius warmer during the summer months.
New research from Imperial College London found that warmer temperatures and higher population density contribute to SARS-CoV-2 transmission. However, policy interventions such as lockdowns and social distancing remain the most important drivers of disease spread, even in seasonal variations.
A new study led by WCS has updated the global population estimate for Critically Endangered Grauer's gorillas to 6,800 individuals from a previous estimate of 3,800. The findings provide hope for the conservation of this subspecies in eastern DRC.
A new study using a computational model found that cutting food waste would provide enough protein and energy to feed the growing population but fall short in terms of micronutrients like calcium, iron, and vitamin E. Researchers emphasize the need for attention to essential vitamins and minerals to address global nutritional needs.
A study examining global occurrences and population estimates for approximately 92% of all extant bird species found that there are approximately 50 billion individual birds in the world. Most bird species are rare, with only a few having estimated global populations of over 1 billion individuals.
A new study by the University of New South Wales estimates that there are approximately 50 billion individual birds in the world, with many iconic Australian species falling within this number. However, other rare species like the Black-breasted Buttonquail have only around 100 members left, highlighting the need for conservation efforts.
The Saker Falcon's population has recovered in Bulgaria after a 20-year conservation effort, with observations confirming at least one breeding pair. The species was reintroduced in 2015 and bred successfully, paving the way for further releases to restore the population.
The study provides global and country-level estimates of humans living at high altitude, with 81.6 million people found to live above 2,500m. This data is crucial for understanding the impact of life at high altitude on human physiology, adaptation, health, and disease.
A study combining global maps of population and land use with biodiversity data reveals effective environmental stewardship by Indigenous and traditional peoples. Human transformation of terrestrial nature has been long-standing, contradicting the assumption that development is inherently destructive.
A recent study emphasizes the importance of science and need in guiding COVID-19 vaccine allocation and prioritization. The authors argue that legal status should have no place in decisions about vaccine access and that poorer countries may not be able to widely vaccinate their populations until 2023.
Low-volume HIIT (less than 20 minutes total exercise time) yields comparable improvements to longer interventions despite requiring significantly less time. This approach is especially beneficial for individuals with busy schedules who struggle to meet current physical activity guidelines.
A new study estimates that nearly 20,000 T. rex lived concurrently, with a total of 2.5 billion individuals over their entire existence. The authors used Darmuth's Law to estimate population-level traits and the rate of fossil preservation, finding that only about 1 in 80 million T. rex survived as fossilized remains.
A study by VCU researchers found that older people and Republicans were less likely to support vaccine donations, while Democrats and those without health insurance were more supportive. The majority of respondents agreed on donating up to 10% of available vaccines.
A recent study by the University of Sydney found that 64% of the world's arable land is at risk of pesticide pollution. The research highlights concerns about human health and environmental impacts associated with widespread agricultural pesticide use, particularly in regions like Asia and Europe.
New research reveals coastal populations experience relative sea-level rise of 7.8-9.9mm/year, outpacing the global average by up to four times, highlighting the urgent need for addressing human-induced subsidence to protect people and economies.
The study reveals that despite local coral loss, global extinction risk is lower for most species due to broad geographic ranges and huge population sizes. The researchers estimate that only a few dozen of the 80 considered species are threatened with extinction.
Researchers suggest three ways to improve COVID-19 vaccine distribution, prioritizing global health impact and addressing health disparities. By focusing on both direct and indirect health effects, countries can assist each other in vaccine production, distribution, and consumption.
Research integrating genetics and archaeology reveals that diverse East Asians derive ancestry from a shared lineage that split over 40,000 years ago. This ancient lineage contributed to the development of modern languages, including Sino-Tibetan and Japonic families.
A study by Cornell Lab of Ornithology scientists found House Sparrow populations declining in North America, with larger winter flocks in urban areas. The decline is attributed to a lack of urban green space and nesting sites, similar to European studies.
A new study reveals that quantity of education does not necessarily translate to quality, and the global skills gap is widening due to inadequate measurement methods. The Skills in Literacy Adjusted Mean Years of Schooling (SLAMYS) indicator shows a significant gap between high- and low-performing countries.
The Asia Pacific Consortium on Osteoporosis has launched the first pan-Asia Pacific clinical practice standards for screening, diagnosis, and management of osteoporosis. The standards aim to provide optimal care for high-risk groups and reduce the burden of osteoporosis worldwide.
Researchers found that up to 25% of reported bee species are no longer being recorded globally, with declines in halictid and Melittidae families. The study suggests a trend of declining wild bee populations worldwide, highlighting the need for immediate action.
A recent study by Arizona State University analyzed large-scale land acquisitions and their impact on climate change. The research found that implementing environmental regulations can significantly reduce carbon emissions, but this comes at the cost of reducing the amount of land available for agricultural development.
A new study predicts that the number of people suffering extreme droughts will more than double by the late 21st century due to climate change. Global land area and population facing extreme droughts could increase from 3% to 7-8%, posing significant threats to food security and human migration.
Recent studies document striking patterns of insect biodiversity loss, with many populations decreasing at annual rates of 1-2% a year due to human activities such as agriculture. However, some species are increasing in abundance and geographic distribution in temperate and Arctic areas.
The study analyzed 841 large cities' urban built-up areas expansion, population growth, and greening changes, revealing a huge pace of urbanization disparity. China demonstrated the biggest urban expansion, while cities in low-income countries lagged behind in infrastructure development and greening.
A new analysis suggests that subsidence, the sinking of ground's surface, will impact 19% of the world's population - 21% of GDP - by 2040. The model identifies areas with high susceptibility to subsidence, particularly in Asia, where 635 million inhabitants are exposed.
A study estimates that nearly a quarter of the world's population may not have access to a COVID-19 vaccine until at least 2022. Researchers found that 3.7 billion adults worldwide are willing to receive a COVID-19 vaccine, highlighting the importance of equitable strategies.
A clear goal is needed to stop human-driven species extinctions, but current drafts risk failure. Scientists propose an ambitious, unambiguous goal with quantifiable elements to measure progress and prevent perverse outcomes.
A study found that amphibian declines due to the amphibian chytrid fungus exacerbated malaria outbreaks in Costa Rica and Panama during the 1990s and 2000s. Preserving biodiversity can benefit humans as well as local ecosystems.
A new study by Queensland University of Technology found that esports players are up to 21% healthier than the general population, with many engaging in over an hour of physical exercise per day. The research also showed that top esports players were significantly more physically active and less likely to smoke or drink daily.
A McGill University-led team found that extreme population declines among a small number of vertebrate species drive the apparent global decline. Removing these outliers reveals a more hopeful picture of global biodiversity. The study provides reason for hope in conservation efforts.
Dr. Michelle A. Albert is recognized for her groundbreaking research on cardiovascular population research, addressing social determinants of health and health disparities in vulnerable populations. Her work aims to improve cardiovascular health and reduce health inequities globally.
New research suggests fin whales sing multiple different songs, which may be picked up by migrating individuals and spread to different parts of the ocean. This complex behavior provides new insights into how fin whale populations move and change over time.
Researchers found a seesaw pattern between Indian and western North Pacific summer monsoons, influenced by the tropical Atlantic Ocean's sea surface temperature. The study reveals increasing influences from the tropical Atlantic SST may lead to changes in monsoon variability.
Watching high-quality nature programs on TV can uplift moods and reduce negative emotions, while experiencing virtual reality nature can lead to increased positive feelings and a stronger connection to the natural world. The study found that interactive VR experiences had the most significant benefits.
The Great Barrier Reef has lost half its corals in the past three decades, with small, medium, and large coral populations declining by more than 50 percent. This decline is driven by climate change, which is causing record-breaking temperatures to trigger mass bleaching events.
A new study estimates that the energy needed to provide decent living standards in 2050 could be met with less than 40% of today's global energy, roughly equivalent to levels in the 1960s. The research suggests that sweeping changes in consumption and widespread deployment of advanced technologies are necessary for achieving this goal.
A large international consortium study found over 5,000 genetic mutations affecting blood characteristics worldwide. Researchers identified specific mutations linked to increased lymphocyte levels in South Asian populations, highlighting potential risks and treatment targets.
A study of over 2,000 species reveals that common animal populations are rising and falling at a rate similar to rare species due to global change. Amphibians, however, experienced declines, while birds, mammals, and reptiles showed increases.