• U.S. Revokes Visas of 1,000 Chinese Students Considered “High Risk”

    The U.S. says it has revoked the visas of more than 1,000 Chinese citizens considered “high risk” to U.S. security because of alleged ties with the Chinese military. The Trump administration has charged that Chinese students have come to the United States to steal intellectual property to advance China’s economic and military sectors.  

  • Climate Change Will Ultimately Cost Humanity $100,000 Per Ton of Carbon, Scientists Estimate

    Economists frequently try to estimate the societal cost of releasing carbon dioxide into the atmosphere, but few of their projections go beyond the year 2100—far short of the millennia it takes for the climate changes from burning carbon to ultimately subside. Two geoscientists and a philosopher from the University of Chicago wanted to take a much longer view on the matter. Their new estimate for an “ultimate cost of carbon” to humanity, published in the journal Climactic Change, came out closer to $100,000 per ton of carbon—a thousand times higher than the $100 or less routinely calculated for the cost to our generation.

  • Combatting Potential Electromagnetic Pulse (EMP) Attack

    Electromagnetic Pulse (EMP) weapons have the potential to disrupt unprotected critical infrastructure within the United States and could impact millions over large parts of the country. DHS says it continues to prepare against evolving threats against the American homeland, most recently highlighting efforts to combat an EMP attack.

  • Devastating Hurricanes Could Be Up to Five Times More Likely in the Caribbean

    Global warming is dramatically increasing the risk of extreme hurricanes in the Caribbean, but meeting more ambitious climate change goals could up to halve the likelihood of such disasters in the region, according to new research.

  • Natural Disasters Must Be Unusual or Deadly to Prompt Local Climate Policy Change

    Natural disasters alone are not enough to motivate local communities to engage in climate change mitigation or adaptation, a new study found. Rather, policy change in response to extreme weather events appears to depend on a combination of factors, including fatalities, sustained media coverage, the unusualness of the event and the political makeup of the community.

  • Algorithm Could Quash Abuse of Women on Twitter

    Online abuse targeting women, including threats of harm or sexual violence, has proliferated across all social media platforms, but researchers have developed a statistical model to help drum it out of the Twittersphere.

  • Would You Fall for a Fake Video? Research Suggests You Might

    Deepfakes are videos that have been manipulated in some way using algorithms. As concerns about election interference around the globe continue to rise, the phenomenon of deepfakes and their possible impact on democratic processes remains surprisingly understudied.

  • Chemical Fingerprint for Explosives in Forensic Research

    The police frequently encounter explosives in their forensic investigations related to criminal and terrorist activities. Chemical analysis of explosives can yield valuable tactical information for police and counterterrorist units.

  • Sea Level Rise Matches Worst-Case Scenario

    Ice sheets in Greenland and Antarctica whose melting rates are rapidly increasing have raised the global sea level by 1.8cm since the 1990s, and are matching worst-case climate warming scenarios. “The melting is overtaking the climate models we use to guide us, and we are in danger of being unprepared for the risks posed by sea level rise,” says one expert.

  • U.S. Flood Strategy Shifts to ‘Unavoidable’ Relocation of Entire Neighborhoods

    For years, even as seas rose and flooding worsened nationwide, policymakers stuck to the belief that relocating entire communities away from vulnerable areas was simply too extreme to consider — an attack on Americans’ love of home and private property as well as a costly use of taxpayer dollars. Christopher Flavelle writes that now, however, that is rapidly changing amid acceptance that rebuilding over and over after successive floods makes little sense. Using tax dollars to move whole communities out of flood zones is swiftly becoming policy, marking a new and more disruptive phase of climate change.

  • Ultrasensitive Measurements Detect Nuclear Explosions

    Imagine being able to detect the faintest of radionuclide signals from hundreds of miles away. Scientists have developed a system which constantly collects and analyzes air samples for signals that would indicate a nuclear explosion, perhaps conducted secretly underground. The system can detect just a small number of atoms from nuclear activity anywhere on the planet. In terms of sensitivity, the capability – in place for decades – is analogous to the ability to detect coronavirus from a single cough anywhere on Earth.

  • Warming May Force Some Favorite Produce Crops to Get a Move On

    Record drought and heat have some farmers worried about where and when crops can be grown in the future, even in California where unprecedented microclimate diversity creates ideal growing conditions for many of the most popular items in America’s grocery stores Warmer California temperatures by mid-century will be too hot for some crops, just right for others.

  • Can Anonymous Classrooms Protect Students from Beijing’s Snooping?

    With many American universities holding online courses this semester because of the pandemic, faculty members at Princeton, Harvard and other elite schools are looking for ways to protect the privacy and identity of students logging in from Hong Kong and China, where they are subject to China’s repressive rules on self-expression.  

  • Water Efficiency Achievable Throughout U.S. without Decrease in Economic Activity

    A recent study showed that targeted efforts to increase water efficiency could save enough water annually to fill Lake Mead. It could happen without significantly compromising economic production, jobs or tax revenue.

  • The World's Biggest Waves: How Climate Change Could Trigger Large Landslides and “Mega-Tsunamis”

    Natural hazards which are triggered, made more frequent, or exacerbated by climate change can’t be prevented, but damage to infrastructure and populations can be minimized. This can be achieved through scientific understanding of the physical processes, site-specific engineering risk analysis and coastal management of hazard-prone regions.