Big gaps between the U.S. and Iran over the measures needed to roll back and limit the Iranian nuclear program are stalling the Vienna talks, European diplomats and former U.S. officials briefed on the issue tell me. What's happening: The Biden administration has said any deal to restore the 2015 nuclear accord must include a return by Iran to full compliance with its previous commitments. But that's complicated by the fact that Iran's nuclear program has advanced since 2015.
SCI COMMUN### Planetary science The Wright brothers' storied flight at Kitty Hawk had a sequel this week more than 288 million kilometers away: Ingenuity, NASA's $80 million minihelicopter, took a 1-minute test hop on Mars, the first controlled flight of a powered aircraft on another planet. The autonomous 1.8-kilogram machine, the size of a tissue box, spun up its 1.2-meter rotors to more than 2500 revolutions per minute before ascending about 3 meters and hovering in the thin martian air. Ingenuity rotated and took a picture before alighting back on the surface. NASA plans to send Ingenuity, which first landed on Mars on 18 February with the Perseverance rover, on four more flights of increasing height and distance and to use the resulting data to build larger, more ambitious helicopters to explore the Red Planet. 14 of 15 —U.S. states not requiring people to wear masks in public recorded relatively high rates of new COVID-19 cases from May to October 2020. None of eight states with high mask wearing had high rates of infection. ( PLOS ONE ) ### Natural resources Just 19% of Earth's lands are truly wild, with no history of human impact, a new study shows. In other parts of the globe, however, biodiversity hot spots have survived even where humans thrived, thanks in part to millennia of beneficial land management practices by Indigenous people, these researchers conclude. By 10,000 years ago, humans had already spread across three-quarters of the globe, and their controlled burns, small-scale farming, and other practices may have sustained or even improved biodiversity, according to the analysis of past and present land use, published this week in the Proceedings of the National Academy of Sciences . The finding sheds light on a long debate between archaeologists, who cited evidence of this lengthy history, and conservationists, who have insisted that humans did not significantly affect biodiversity until intensive agriculture, urbanization, and deforestation began 200 years ago. Because of the present-day overlap between biodiversity hot spots and lands occupied by Indigenous people, the study bolsters the idea that the growing push to help them regain and retain control over their lands might help protect biodiversity. ### Astronomy The Event Horizon Telescope (EHT) collaboration, which in 2019 produced the first image of a black hole's shadow, this week completed another observing campaign, its first in 3 years. Organizers hope their network of radio telescopes will reveal more of the dark heart of the nearby M87 galaxy as well as the Milky Way's center and the quasar 3C 273. EHT must synchronize 10 observatories across the globe in good weather, so its observing window each year is short. Three observatories joined the network this year (including the Kitt Peak 12-meter telescope in Arizona, below), which will sharpen images. Researchers gathered data for more than seven full nights over 2 weeks this month, and EHT spokesperson Eduardo Ros called the results “excellent.” Now begins a long wait as recorded data are shipped to Boston and Bonn, Germany, for months of processing before an image might be revealed. ### Scientific societies The 90-year-old American Association of Physical Anthropologists (AAPA) has rechristened itself in order to separate today's association from the field's racist and colonial past. At AAPA's virtual annual meeting last week, an overwhelming majority of members voted to delete the word “physical” and become the American Association of Biological Anthropologists. They acknowledged that the old name has roots in the 19th century, when early anthropologists helped create damaging concepts of race by quantifying physical differences among people. The new name conveys that anthropology is now a multidisciplinary biological science that deals with the adaptations, variability, and evolution of humans and their living and fossil relatives, as well as their culture and behavior, according to a statement by the current and past AAPA presidents. “Importantly, the change allows us to reflect deeply on issues of racism and colonialism, which, at times, permeated the field of ‘physical anthropology,’” they wrote. ### Climate science California and its partners announced plans last week to launch two satellites by 2023 to spot plumes of planet-warming carbon dioxide and methane. The $100 million Carbon Mapper project, financed by publisher Michael Bloomberg and other philanthropists, will advance efforts to track concentrated emissions of greenhouse gases that rise from sources such as fossil fuel power plants and leaky pipelines. Previous satellites have lacked the resolution, sensitivity, and focus to collect the data officials need in order to regulate the emissions effectively. The new spacecraft will rely on “hyperspectral” imaging spectrometers that can record more than 400 visible and infrared wavelengths, whose patterns can reveal the abundances of certain gases in the atmosphere below. ### Public health A tiny fraction of the U.S. residents fully vaccinated against COVID-19 by 14 April have become infected, the U.S. Centers for Disease Control and Prevention (CDC) said last week. The agency said it expected some “breakthrough” infections and that the low numbers support the value of the inoculations. CDC said it received 5814 reports of such infections in 75 million people vaccinated in 43 U.S. states and territories. Of the infected people, 65% were female, 45% were 60 or older, and 29% were asymptomatic. Seven percent were hospitalized, and 1% died, some from causes unrelated to COVID-19. CDC cautioned that the data from the states reporting might be incomplete. Public health specialists say the infections were more likely to have resulted from weak immune responses to vaccination than to mutations in the virus that let it evade those defenses. ### COVID-19 Researchers at the University of Oxford will intentionally reinfect people previously infected by the virus that causes COVID-19 to study their immune responses and symptoms. The “human challenge trial,” announced on 19 April, will initially re-expose up to 64 volunteers who previously tested positive for the virus and measure what viral dose triggers new infections. A U.K. government ethics panel approved the study and a similar one led by Imperial College London scientists who are evaluating the performance of COVID-19 vaccines. Such experiments may provide results faster than other trial methods allow. ### Anthropology More than 1300 skulls held in a museum collection that was used to justify racism will now be available for return to communities of the people's descendants, the University of Pennsylvania said last week. Samuel Morton started the collection in the 19th century and used studies of its contents to support the idea of white superiority. Many of the crania belonged to enslaved Africans and Indigenous people. In a statement, Christopher Woods, director of the university's Museum of Archaeology and Anthropology, where the Morton Cranial Collection is held, apologized for the “unethical possession of human remains.” The museum will work to identify descendant communities and accept requests for the return of any crania in the collection. Repatriation of human remains, especially Black and Indigenous ancestors, “is part of a cultural and social reckoning” about how to address anthropology's history of racism, Woods says. ### Scientific meetings A talk last week at the virtual annual meeting of the Society for American Archaeology (SAA) sparked criticism for arguing against a key U.S. law giving Native Americans rights to the human remains and artifacts of their ancestors. Many society members were outraged that SAA gave a platform to what they considered a racist and anti-Indigenous presentation. Some note that this incident comes after a sexual harassment scandal at the organization's 2019 conference. In her talk, SAA member and anthropologist Elizabeth Weiss of San Jose State University said archaeologists “have let creationism into the heart of our discipline” because the law, the Native American Graves Protection and Repatriation Act (NAGPRA), allows Indigenous communities to request repatriation of remains, which they may do partly because of religious beliefs. But archaeologists widely support the law, under which many tribes have collaborated with researchers. In response to the criticism, SAA issued a statement encouraging “the rigorous interrogation of diverse views.” SAA President Deborah Nichols later told Science the organization's board rejects the viewpoint of Weiss and her co-author and supports NAGPRA. ### Policy The relatively modest research investments outlined in Canada's new federal budget could make it difficult for the nation to recruit and retain scientific talent, Canadian science advocates fear. The multiyear spending plan, announced on 19 April, includes CA$2.2 billion in mostly new funding for life sciences, with much of the money aimed at boosting biomedical applications and vaccine development. (Canada will continue to provide other spending for research this year under multiyear budgets approved in 2018 and 2019.) But analysts worry the increases are too modest compared with much larger ones proposed for the United States by President Joe Biden, and that some Canadian scientists will look for work south of the border. Under Canada's budget, three main research councils will share CA$250 million for a new joint biomedical research program, and the Canadian Institutes for Health Research will get an additional CA$250 million to fund clinical trials. Universities and research hospitals will get CA$500 million for infrastructure such as equipment and buildings. Three programs—an existing artificial intelligence program and two new ones in genomics and quantum science—will each receive CA$400 million in new funding. ### Publishing Egypt, Iran, Turkey, and other countries in the Middle East and North Africa have boosted their share of scholarly articles in international journals and citations to those papers during the past 4 decades, the Clarivate analytics firm said this month. From 1981 to 2019, the region quadrupled its share of research articles and reviews to 8%; among regions and large countries, only China grew by more. Fifteen of the region's 19 countries had a citation score in 2019 higher than the world average, when adjusted for differences across disciplines; in 2000, almost all had scores well below average. ### Reckoning with climate blues Sustainability scientist Kimberly Nicholas of Lund University found herself struggling with feelings of grief as research by her and others revealed how much climate change will harm agriculture, ecosystems, and human communities. And she discovered she is not alone. In her new book, Under the Sky We Make: How to Be Human in a Warming World , she offers insight into how people and institutions can respond to those feelings and the climate challenge. (A longer version of this interview is at .) > Q: How does your experience with grief inform your thinking about climate change? > A: Things are changing beyond recognition right now from climate change. To me, grieving is an important part of the process of acknowledging that. It does draw from my experience of losing a dear friend to cancer, who died at 37. It was a kind of wake-up call [that prompted me] to think about my core values and what matters. But it shouldn't take a terminal diagnosis for life on Earth to wake us up to the urgency of working for climate stability. > Q: Students come to you distraught about harm to ecosystems they hope to study. What do you tell them? > A: The main thing is not to shy away from those conversations. It's not really helpful to deny the reality or not equip them with the tools to face that reality. You have to acknowledge that they're running into a house that is on fire. > Q: You argue for a shift from what you call the “exploitation mindset.” What's an example? > A: A big wake-up moment for me came at a climate science conference. Pretty much everyone there, including me, had flown in. The presentations were a litany of depressing things happening because of climate change. I felt like I was at this conference of doctors puffing on cigarettes, but telling our patients to quit smoking! I realized we really have an obligation to model the change that we want to see. So, I have pretty much stopped flying for work. It hasn't meant I can't be a productive researcher.
Police in Texas investigating a Tesla car crash in which two men died will serve search warrants on the company to ascertain if the vehicle's autopilot mode was engaged at the time of the incident. However Tesla's CEO, Elon Musk, has said the self-driving feature was not being used, based on an internal probe by the company. In the incident, two men, both in their 50s, were killed after their 2019 Tesla Model S crashed into a tree and caught fire. According to police reports, the car was travelling at a high speed and failed to negotiate a curve in the road. Texas police noted that nobody was at the driving seat at the time of impact, raising doubts about the involvement of the car's autopilot mode.
Human beings, who live by the day and make decisions instantly, have become increasingly dependent on algorithms during the pandemic as machines turn all their inclinations into predictions. Artist Refik Anadol has brought a different artistic interpretation to this addiction with his "Machine Memories: Space" art exhibition, which has recently opened in the Turkish metropolis of Istanbul. Anadol's solo exhibition has also attracted the great attention of giant technology companies around the world. The manager of the Massachusetts Institute of Technology (MIT) Media Lab, which I visited many years ago at the invitation of Turkey's leading information and communication technologies company Türk Telekom, described the success criteria as "making an impact." Now I have met Anadol, an artist who has created an impact all over the world and is admired by data companies.
Kira Radinsky, co-founder and Chairman of Diagnostic Robotics, wants to make healthcare more affordable and accessible. The lessons learned from initial deployments of the startup's AI-based digital triage platform in Israel and the U.S. and the valuable experience gained during the Covid-19 pandemic, point to a future of better healthcare: Providing the right treatment at the right time in the most appropriate setting. At the Mayo Clinic, Diagnostic Robotics' triage platform suggests possible diagnoses and provides a risk score for each patient based on their answers to questions regarding their medical conditions. The Mayo Clinic's Dr. John Halamka calls it "Waze for healthcare," stressing its use as a navigation system, matching patients with the right healthcare resource at the hospital's emergency room or even before they arrive there. The State of Rhode Island has used Diagnostic Robotics' platform to help manage its response to the Covid-19 pandemic.
Data are not only ubiquitous in society, but are increasingly complex both in size and dimensionality. Dimension reduction offers researchers and scholars the ability to make such complex, high dimensional data spaces simpler and more manageable. This Element offers readers a suite of modern unsupervised dimension reduction techniques along with hundreds of lines of R code, to efficiently represent the original high dimensional data space in a simplified, lower dimensional subspace. Launching from the earliest dimension reduction technique principal components analysis and using real social science data, I introduce and walk readers through application of the following techniques: locally linear embedding, t-distributed stochastic neighbor embedding (t-SNE), uniform manifold approximation and projection, self-organizing maps, and deep autoencoders. The result is a well-stocked toolbox of unsupervised algorithms for tackling the complexities of high dimensional data so common in modern society. All code is publicly accessible on Github.
Security Studies president Jim Hanson provides analysis on'Fox & amp; Friends First.' Secretary of State Antony Blinken on Wednesday paid a compliment to the Trump administration for the Abraham Accords struck between Arab nations and Israel in the Middle East. Blinken was testifying before the House Foreign Affairs Committee on the Biden administration's foreign policy agenda. Rep. Darrell Issa, R-Calif., asked Blinken what his predecessor, Secretary Mike Pompeo, did right. He pointed to tech advances and Middle East peace deals. "Trying to help bring the State Department into the 21st century, the use of technology and empowering, some of our people, with technology, something we really want to follow through," Blinken said.
Zhang, Daniel, Mishra, Saurabh, Brynjolfsson, Erik, Etchemendy, John, Ganguli, Deep, Grosz, Barbara, Lyons, Terah, Manyika, James, Niebles, Juan Carlos, Sellitto, Michael, Shoham, Yoav, Clark, Jack, Perrault, Raymond
Welcome to the fourth edition of the AI Index Report. This year we significantly expanded the amount of data available in the report, worked with a broader set of external organizations to calibrate our data, and deepened our connections with the Stanford Institute for Human-Centered Artificial Intelligence (HAI). The AI Index Report tracks, collates, distills, and visualizes data related to artificial intelligence. Its mission is to provide unbiased, rigorously vetted, and globally sourced data for policymakers, researchers, executives, journalists, and the general public to develop intuitions about the complex field of AI. The report aims to be the most credible and authoritative source for data and insights about AI in the world.
The Biden administration has quietly imposed temporary limits on counterterrorism drone strikes and commando raids outside conventional battlefield zones like Afghanistan and Syria, and it has begun a broad review of whether to tighten Trump-era rules for such operations, according to officials. The military and the C.I.A. must now obtain White House permission to attack terrorism suspects in poorly governed places where there are scant American ground troops, like Somalia and Yemen. Under the Trump administration, they had been allowed to decide for themselves whether circumstances on the ground met certain conditions and an attack was justified. Officials characterized the tighter controls as a stopgap while the Biden administration reviewed how targeting worked -- both on paper and in practice -- under former President Donald J. Trump and developed its own policy and procedures for counterterrorism kill-or-capture operations outside war zones, including how to minimize the risk of civilian casualties. The Biden administration did not announce the new limits.