The Smithsonian Environmental Research Center has just launched a new series of 15 short educational videos titled “Ecosystems on the Edge,” which mainly focus on […]

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Almost 14 billion years ago, the universe we inhabit burst into existence in an extraordinary event that initiated the Big Bang. In the first fleeting […]

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The Death Star of the movie Star Wars may be fictional, but planetary destruction is real. Astronomers announced today that they have spotted a large, […]

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“Think of a lion shrunk to the size of a mouse that needs to eat every 20 minutes or so.” That is a shrew, says […]

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The center of our Galaxy has been intensely studied for many years, but it still harbors surprises for scientists. A snake-like structure lurking near our […]

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This winter has brought many intense and powerful storms, with cold fronts sweeping across much of the United States. On a much grander scale, astronomers […]

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Even tiny crustaceans scuttling across the deepest, darkest depths of the ocean floor will feel the effects of climate change, according to a new study […]

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The universe is 13.8 billion years old, while our planet formed just 4.5 billion years ago. Some scientists think this time gap means that life […]

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Cambridge, MA -Physicists are capitalizing on a direct connection between the largest cosmic structures and the smallest known objects to use the universe as a […]

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In this study, the atomic structure of the ternary icosahedral ZnMgTm quasicrystal (QC) is investigated by means of single-crystal X-ray diffraction. The structure is found to be a member of the Bergman QC family, frequently found in Zn–Mg–rare-earth systems. The ab initio structure solution was obtained by the use of the Superflip software. The infinite structure model was founded on the atomic decoration of two golden rhombohedra, with an edge length of 21.7 Å, constituting the Ammann–Kramer–Neri tiling. The refined structure converged well with the experimental diffraction diagram, with the crystallographic R factor equal to 9.8%. The Bergman clusters were found to be bonded by four possible linkages. Only two linkages, b and c, are detected in approximant crystals and are employed to model the icosahedral QCs in the cluster approach known for the CdYb Tsai-type QC. Additional short b and a linkages are found in this study. Short interatomic distances are not generated by those linkages due to the systematic absence of atoms and the formation of split atomic positions. The presence of four linkages allows the structure to be pictured as a complete covering by rhombic triacontahedral clusters and consequently there is no need to define the interstitial part of the structure (i.e. that outside the cluster). The 6D embedding of the solved structure is discussed for the final verification of the model.

Most earthworms in U.S. soils aren’t native–and they are threatening America’s forests. Smithsonian ecologist Melissa McCormick explains how earthworms can be good for gardens and […]

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A peek inside the gates at the Goodman Games late summer 2017. Held in the heart of Anacostia’s historic Barry Farm, the Goodman League hosts […]

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Shallow-water seagrasses can’t survive without enough light. And fish, shrimp, crabs and other creatures we rely on for food can’t survive without seagrasses. Smithsonian biologist […]

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Smithsonian biologist Cindy Gilmour describes where mercury pollution comes from, how it morphs into the neurotoxin methylmercury, and if we’re finally starting to solve the […]

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When Gary Graves cranks up his boom box and drives remote back roads through pine plantations in Texas, Louisiana and other southern states, a few […]

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The development of antiviral strategies requires a clear understanding of the principles that control the protein arrangements in viral shells. Considered here are those capsids that violate the paradigmatic Caspar and Klug (CK) model, and it is shown that the important structural features of such anomalous shells from the Picobirnaviridae, Flaviviridae and Leviviridae families can be revealed by models in the form of spherical icosahedral packings of equivalent rhombic structural units (SUs). These SUs are composed of protein dimers forming the investigated capsids which, as shown here, are based on the rhombic triacontahedron (RT) geometry. How to modify the original CK approach in order to make it compatible with the considered rhombic tessellations of a sphere is also discussed. Analogies between capsids self-assembled from dimers and trimers are demonstrated. This analysis reveals the principles controlling the localization of receptor proteins (which recognize the host cell) on the capsid surface.

Immigration benefits the U.S. economy overall and has little negative effect on the income and job opportunities of most native-born Americans, says a new report by a panel of the National Research Council.

The high rate of premature births in the United States constitutes a public health concern that costs society at least $26 billion a year, according to a new report from the Institute of Medicine of the National Academies.

Medication errors are among the most common medical errors, harming at least 1.5 million people every year, says a new report from the Institute of Medicine of the National Academies.

A new report from the National Research Council examines and, when possible, estimates hidden costs of energy production and use.

Americas health care system has become too complex and costly to continue business as usual, says a new report from the Institute of Medicine

There would not be sufficient benefit to updating estimates of the social cost of carbon (SCC) within a year based only on the revision of a specific climate parameter in the existing framework used by the government’s interagency group to measure the SCC, says a new interim report from the National Academies of Sciences, Engineering, and Medicine.

To estimate the social cost of carbon dioxide for use in regulatory impact analyses, the federal government should use a new framework that would strengthen the scientific basis, provide greater transparency, and improve characterization of the uncertainties of the estimates, says a new report by the National Academies of Sciences, Engineering, and Medicine.

Nearly half of the nation’s spending on health care is driven by 5 percent of patients, and improving health outcomes and curbing spending in health care will require identifying who these high-needs patients are and providing coordinated services through successful care models that link medical, behavioral, and community resources, says a new National Academy of Medicine special publication.

The U.S. lacks icebreaking capability in the Arctic and Antarctic and should build four polar icebreakers with heavy icebreaking capability to help minimize the life-cycle costs of icebreaker acquisition and operations, says a new congressionally mandated letter report from the National Academies of Sciences, Engineering, and Medicine.

Representatives from the national academies of sciences of the G20 countries handed over recommendations for improving marine conservation to the Japanese Prime Minister Shinzo Abe.

The Gulf Research Program (GRP) of the National Academies of Sciences, Engineering, and Medicine today announced a new funding opportunity under its Healthy Ecosystems Initiative.

A new report from the National Academies of Sciences, Engineering, and Medicine says that enhancements to the geodetic infrastructure are needed to answer important questions about sea level rise, water resources, geological hazards, and more over the next decade.

Understanding the impacts of human activities on Marine and Coastal is important to ensure their sustainability. New research has indicated that seafloor ecosystems are less likely to recover from fishing if they are in rocky or reef habitats and if dredging and bottom trawling equipment is used for shellfish and various fish species. When fishing is combined with the extraction of aggregate for mineral resources, the impacts are even more damaging.

A new study has investigated the impacts of human activity on Antarctic Marine and Coastal. Alongside local effects of fishing, pollution and invasive alien species, global climate change is causing sea temperature rises and ocean acidification. Action is therefore needed at all levels to address these impacts.

Some Marine and Coastal have been altered over long periods of time, resulting in a loss of knowledge of their true healthy state, new research suggests. In this UK study, researchers used historical records, samples of sediment and present-day diving surveys to reconstruct the true history of shellfish beds on the east coast of Scotland.

Populations of organisms that live on the bottom of an aquatic ecosystem, the benthic community, can be assessed to determine the health of the ecosystem. New research explores the many existing methods for assessing benthic communities to ensure that the most appropriate and useful tests are used under the Water Framework Directive (WFD).

A recent study has assessed the costs and effectiveness of reducing phosphorus pollution for lakes in Scotland, UK, to achieve good ecological status as required by the EU???s Water Framework Directive (WFD). It was found that phosphorus in 72% of the lake area in Scotland could be mitigated at a cost of ??5.7 million (???7 million) per year, which is considered a proportionate or reasonable cost given the resulting social benefits.

Researchers have developed a new model to assess the health-related external costs arising from air pollution from ten major emission sectors. Applying the model at national and Europe-wide levels, they suggested that the major contributors to costs were industrial power production, agriculture, road traffic and domestic combustion.

Green roofs can cool buildings in summer and prevent heat loss in winter. A new study suggests, however, that in the warm climates of southern Europe the additional cost of watering means that 'cool roof coatings??? may be more cost effective.

Marine litter is a major issue in deep sea ecosystems in the Mediterranean Sea, new research confirms. A recent study shows that the total weight of litter found in these sensitive areas often equals, and even exceeds, that of the animals that live there. This work can provide a baseline for assessments of the impact of deep sea marine litter and to inform future policy reforms, the researchers suggest.

The world’s marine ecosystems are at risk of sudden and damaging changes. The authors of a recent study say that co-ordinated management of the many drivers of marine changes, such as overfishing and pollution, is needed across international, national and local scales to help avoid the ‘regime shifts’ that affect ecosystem services and human wellbeing.

Groundwater is the earth’s largest freshwater resource and is vital for irrigation and global food production. In dry periods farmers pump groundwater to water crops, this is already happening at an unsustainable level in many places — exceeding the rate at which rain and rivers can refill the groundwater stores. This study seeks to identify where groundwater pumping is affecting stream flows and estimates where and when environmentally critical stream flows — required to maintain healthy ecosystems — can no longer be sustained.

A survey of over 600 private boats docked in marinas throughout the Mediterranean showed that 71% are carrying non-indigenous species. In certain cases, non-indigenous species can become ‘invasive’ and have enormous and long-lasting impacts on ecosystems. The findings suggest that a common monitoring strategy may be necessary to prevent further disruptions to natural ecosystems.

‘Payment for ecosystem services’ (PES) has become a commonly used term in recent years, yet the concept is not well defined. A new study reviewing PES theory, concepts and practice from around the world provides a valuable overview, concluding that more can be done to share learning.

Millions of years ago, Africa's savannas were covered with thick, ancient forests, which disappeared and turned into the grassy ecosystems that they are today.

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Tightly compacted cities can increase flooding risk for local residents, but sprawling, suburban development can lead to major losses in carbon stored by the land and agricultural production. These are the conclusions of a study which explored the effects of different urbanisation patterns on vital ecosystem services.

Extreme and catastrophic floods in Europe, such as those seen in 2013, currently occur approximately once every 16 years, but this may increase to once every 10 years by 2050, according to new research. The study also suggests that annual average economic losses caused by extreme floods could reach almost five times higher than 2013 values.

Research into ecosystem services has flourished considerably since the publication of UNEP's Millennium Ecosystem Assessment in 2005, notably the ongoing Economics of Ecosystems and Biodiversity (TEEB) project, which is making a compelling case for promoting conservation by estimating the economic benefits of ecosystems to human welfare and the economic cost to society of ecosystem decline. This thematic issue provides a snapshot of the latest research in the most recent chapter of ecosystem services' story. It aims to help guide future conservation and sustainable development policies.

Biodiversity and ecosystems provide many critical life support functions and benefits for human wellbeing, security and economic growth, including food, clean water, recreational services and climate regulation. Despite its significant values, biodiversity worldwide is being lost, in some areas at a rapid rate. Given these losses, there is an urgent need for firstly, greater application of policies and incentives to promote the conservation and sustainable use of biodiversity and ecosystem services, and secondly, a more efficient use of available finance in existing biodiversity programmes. PES is a flexible, incentive-based mechanism that has potential to deliver in both of these areas. This Thematic Issue of Science for Environment Policy explores research which can help guide effective Payments for Ecosystem Services (PES) schemes. Under PES agreements, a user or beneficiary of an ecosystem service provides payments to individuals or communities whose management decisions and practices influence the provision of ecosystem services.

Environmental impact studies which are conducted early on in the development of wave and tidal-power schemes allow the schemes' technology to be adapted to consider their impacts on marine ecosystems, according to a recent study which reports on a Swedish research wave park.

Tiny organisms called phytoplankton, which are crucial components of marine ecosystems, have been slowly disappearing over the last century, according to researchers. The decline is worrying because it may have profound effects on marine life, fisheries and carbon cycling. The study suggests the decline in phytoplankton could be linked to climate change.