• Nuclear Physics Used to probe Floridan Aquifer Threatened by Climate Change

    Florida is known for water. Between its beaches, swamps, storms and humidity, the state is soaked. And below its entire surface lies the largest freshwater aquifer in the nation. As rising sea levels threaten coastal areas, scientists are using an emerging nuclear dating technique to track the ins and outs of water flow.

  • New, $125 Million Project Aims to Detect Emerging Viruses

    A new project, funded with $125 million from USAID, aims to detect and characterize unknown viruses which have the potential to spill over from wildlife and domestic animals to human populations. The 5-year project is expected to yield 8,000 to 12,000 novel viruses, which researchers will then screen and sequence the genomes of the ones that pose the most risk to animal and human health.

  • How Big Was the 2020 Beirut Explosion?

    On 4 August 2020, one of the largest non-nuclear explosions in history pulverized a Beirut port and damaged more than half the city. The explosion resulted from the detonation of tons of ammonium nitrate, a combustible chemical compound. The explosive yield estimates varied widely, and in some cases, were inconsistent with what would be expected based on the amount of ammonium nitrate stored at the Beirut harbor.

  • Hydrogen Can Play Key Role in U.S. Decarbonization

    “Hydrogen is not really an energy source. It is rather an energy carrier or what we often call an energy vector,” says Berkeley Lab’s Ahmet Kusoglu. “So, you have to produce hydrogen from another energy source, store it, and then use or convert it. Hydrogen is a versatile and flexible energy carrier because it can be produced from various sources and for different applications. This flexibility is a key benefit of hydrogen versus other hydrocarbon fuels or energy storage technologies like batteries.”

  • Disrupting Asteroids to Protect the Earth

    If an asteroid is on an Earth-impacting trajectory, scientists typically want to stage a deflection, where the asteroid is gently nudged by a relatively small change in velocity, while keeping the bulk of the asteroid together. Researchers have examined how different asteroid orbits and different fragment velocity distributions affect the fate of the fragments, using initial conditions from a hydrodynamics calculation, where a 1-Megaton-yield device was deployed a few meters off the surface of a 100-meter diameter asteroid.

  • Record-Breaking Texas Drought More Severe Than Previously Thought

    In 2011, Texas experienced one of its worst droughts ever, with the dry, parched conditions causing more than $7 billion in crop and livestock losses, sparking wildfires, pushing power grids to the limit, and reducing reservoirs to dangerously low levels. A new study finds that the drought was worse than previously thought.

  • Safe Airspace in the Age of Drones

    Drones are becoming more and more ubiquitous, and are being used for everything from backyard fun to military operations. As the technologies for UAS continues to improve, so has the potential for them to be used in illegal and dangerous ways.

  • Hacking for Homeland Security

    On Monday (4 September), the Department of Homeland Security (DHS) announced the launch of the third Hacking for Homeland Security (H4HS). Participating students will focus on challenges associated with cybersecurity information sharing within transportation, the latency issue at screening checkpoints, and address greenspace issues after natural disasters.

  • New Tool Mappin Floods Since 1985 Will Aid Disaster Planning

    Free online World Flood Mapping Tool will help plan urban and agricultural development, effective flood defenses, disaster readiness, and identify supply chain vulnerabilities

  • Little Difference between Managed, Unmanaged Flows of Urban Stormwater

    A new study suggests that expensive efforts to control urban stormwater by investing heavily in green infrastructure — such as water-quality ponds, infiltration basins, porous pavement and riparian plantings — may not have much of an impact.

  • Innovative Air Domain Awareness Technology

    DHS S&T is evaluating an innovative air domain awareness technologies to help protect the airspace along our northern border with Canada.

  • Current Southwest Drought Is a Preview of Things to Come

    Scientists found that the record-low precipitation that kicked off the unprecedented drought parching the U.S. Southwest since 2020 could have been a fluke—just the rare bad luck of natural variability. But the drought would not have reached its current punishing intensity without the extremely high temperatures brought by human-caused global warming.

  • Apps for Popular Smart Home Devices Contain Security Flaws

    As Internet of Things (IoT) devices such as connected locks, motion sensors, security cameras and smart speakers become increasingly ubiquitous in households across the country, their surging popularity means more people are at risk of cyber intrusions. Researchers have found that the smartphone companion applications of 16 popular smart home devices contain “critical cryptographic flaws” that could allow attackers to intercept and modify their traffic.

  • The Effect of Imports of Neodymium Magnets on U.S. National Security

    The Commerce Department’s Bureau of Industry and Security (BIS) has initiated an investigation to determine the effects on U.S. national security from imports of Neodymium-iron-boron (NdFeB) permanent magnets.

  • Small Increases in Greenhouse Gases Will Lead to Decades-Long “Megadroughts” in U.S. Southwest

    Recent NOAA-funded research found that even small additional increases in greenhouse gas emissions will make decades-long “megadroughts” – similar to the drought which has descended on the U.S. southwest nearly twenty years ago — more common.