We thought hominins evolved to run around 2 million years ago – but a study of the famous Lucy's species, Australopithecus afarensis, suggests she could run too

Elliott vs. Argentina is one of those court cases so important and complex that only a Power Ranger, Transformers, Legos and wooden trains can possibly do it justice. (November 30, 2012)

A trillion new trees isn’t the only climate solution, but it is the cheapest and it would make a huge difference if we do it right, says ecologist Tom Crowther

Rocks from a 3.2-billion-year-old formation in Australia show changes in the direction of their magnetism over time that suggest plate tectonics started earlier than we thought

We need to scale up testing efforts to tackle the coronavirus pandemic, and looking for signs of virus RNA in our sewage could provide a shortcut

Millions more Americans sought unemployment benefits last week, suggesting layoffs broadened from consumer-facing industries to other segments of the economy and could remain elevated even as many parts of the country start to reopen. This report produced by Yahaira Jacquez.

Millions more Americans sought unemployment benefits last week, suggesting layoffs broadened from consumer-facing industries to other segments of the economy and could remain elevated even as many parts of the country start to reopen. This report produced by Yahaira Jacquez.

Title: Report: Polluted Air Puts Millions at Risk
Category: Health News
Created: 5/2/2008 12:00:00 AM
Last Editorial Review: 5/2/2008 12:00:00 AM

Title: Trampolines Linked to More Than 1 Million ER Visits Over a Decade
Category: Health News
Created: 5/2/2014 12:35:00 PM
Last Editorial Review: 5/2/2014 12:00:00 AM

Title: More Active Kids Could Save U.S. Billions in Health Costs: Study
Category: Health News
Created: 5/1/2017 12:00:00 AM
Last Editorial Review: 5/2/2017 12:00:00 AM

Title: One Million Volunteers Sought for NIH Genetics and Health Study
Category: Health News
Created: 5/2/2018 12:00:00 AM
Last Editorial Review: 5/2/2018 12:00:00 AM

Title: Trump Orders Meat Plants to Stay Open as U.S. Coronavirus Cases Pass 1 Million
Category: Health News
Created: 4/29/2020 12:00:00 AM
Last Editorial Review: 4/29/2020 12:00:00 AM

Title: NIH Launches $500 Million Contest to Produce Best COVID-19 Test
Category: Health News
Created: 4/29/2020 12:00:00 AM
Last Editorial Review: 4/30/2020 12:00:00 AM

Title: U.S. Jobless Rate at Nearly 15 Percent as Coronavirus Cases Top 1.2 Million
Category: Health News
Created: 5/8/2020 12:00:00 AM
Last Editorial Review: 5/8/2020 12:00:00 AM

Title: Trump Says Obamacare Must Go as U.S. Coronavirus Cases Climb Past 1.2 Million
Category: Health News
Created: 5/7/2020 12:00:00 AM
Last Editorial Review: 5/8/2020 12:00:00 AM

It's official—PMC has just become home to two million articles! The record-breaking article, which came from the American Journal of Medical Genetics Part B: Neuropsychiatric Genetics, became publicly available in the PMC archive on June 23. This new PMC milestone has occurred almost three years to the day since PMC reached its last one: the one-million article mark in June 2007. See also: PubMed Central Hits One Million Article Mark.

As of February 21, 2014, PMC became home to three million articles! As listed on our home page, the content has been provided in part by 1441 full participation journals, 277 NIH Portfolio journals and 2470 selective deposit journals. For related information on PMC milestones, see these announcements from 2007 and 2010, respectively.

Title: Flu Season That's Sickened 26 Million May Be at Its Peak
Category: Health News
Created: 2/21/2020 12:00:00 AM
Last Editorial Review: 2/21/2020 12:00:00 AM

Title: High Heat, Humidity Could Affect More Than 1.2 Billion People by End of Century
Category: Health News
Created: 3/24/2020 12:00:00 AM
Last Editorial Review: 3/25/2020 12:00:00 AM

There is a pressing need for new exploration tools to target and vector towards mineralization in covered terrains. Groundwater provides a valuable and under-utilized geochemical sampling medium, and represents an important and cost-effective tool to expose covered terrains to systematic exploration. For Au exploration, researchers agree the best hydrogeochemistry pathfinder is dissolved Au itself, with additional potential from other pathfinders (albeit non-unique) such as As, Ag, W and Mo. Despite Au's relatively low solubility, with rigorous field protocols and appropriate analytical methods, explorers can respond to dissolved Au directly with robust parts per trillion (ppt)-level analyses.

Even with ppt-level analyses, a practical implication of Au's low solubility is that a deposit's dissolved Au signature is generally weaker than seen in other more mobile pathfinders, producing a smaller detectable footprint, which must be considered when designing exploration programmes. Using purpose-drilled groundwater sampling bores, explorers can collect groundwater samples at the density required to respond to dissolved Au where existing borehole coverage is otherwise insufficient. In addition to its use at the regional scale, with even tighter sample density, hydrogeochemistry also shows promise at the project scale, allowing the 3D modelling of pathfinder dispersion.

For hydrogeochemistry to be widely adopted for Au exploration, explorers need confidence in ppt-level dissolved Au analyses, and the context to understand their significance. This paper aims to address these topics and provide a straightforward starting point for Au explorers interested in applying hydrogeochemistry by: (i) summarizing examples of regional sampling programmes and more focused case studies to illustrate how covered Au deposits create measurable dissolved Au footprints distinguishable from background; and (ii) sharing examples of dissolved Au analyses that are being integrated into exploration at the regional and project scales.

As seen in the results, the distributions of dissolved Au in the regional- and project-scale programmes show remarkably similar and easy to interpret high-contrast, low-frequency anomalies against relatively low backgrounds. These are desirable attributes of any geochemical pathfinder. When combined with the benefits of hydrogeochemistry v. other geochemical exploration tools (e.g. groundwater can create larger footprints requiring fewer samples to detect, and groundwater can recharge from depth to reflect deeper mineralization), dissolved Au is a powerful pathfinder ideally suited for Au exploration in covered terrains.

While this paper focuses on the use of dissolved Au, additional pathfinders can provide valuable information, including indications of lithological changes, hydrothermal alteration and different styles of mineralization, as well as opportunities to use secondary pathfinders when sample density or local conditions may not result in detectable dissolved Au signatures.

Thematic collection: This article is part of the Exploration 17 collection available at: https://www.lyellcollection.org/cc/exploration-17

Thermo Fisher Scientific announced plans in March to acquire Qiagen in a $11.5 billion deal that could bring morediagnostic offeringsand sample-preparation technologies to one of the world's leading manufacturers of scientific instruments, research services, and laboratory consumables.