Measles Outbreak Update, AI in Warfare, Climate Acceleration, and the Squeaky Shoes Study | Scientific American Science Quickly

Overview

This week’s Science Quickly offers a compact tour of four science stories—from public health to AI in national security, to climate dynamics, and a curious study in sports physics. Four segments illuminate how scientific findings translate into policy debates, defense considerations, and everyday technology design.

Measles Outbreak Update in the United States

The episode opens with a detailed update on measles in the United States. South Carolina’s outbreak grew to nearly a thousand cases last week, part of a national wave that began in 2025. The Centers for Disease Control and Prevention reported 50 measles outbreaks in the previous year, totaling over 2,200 confirmed cases and three deaths—the highest since the US was declared measles-free in 2000. Through this year, more than 1,100 confirmed cases have been reported, with the vast majority among unvaccinated people, pushing the country close to losing its measles-free status. The discussion clarifies what elimination means—no continuous community transmission for over 12 months—and notes that Canada and several European countries slipped from elimination status recently.

On the viral characteristics, the host explains how measles is extraordinarily contagious, with an R0 estimated between 12 and 18, and notes that the virus can linger in the air for about two hours, enabling transmission even without direct contact. The piece highlights the severe health consequences: hospitalization rates around 20% for those who contract measles, with about 1 in 1,000 developing brain swelling, and about 3 in 1,000 dying. Long-term effects can include subacute sclerosing panencephalitis, a rare but fatal neurological condition, and immune amnesia, which can wipe out up to 70% of antibodies and leave individuals vulnerable to secondary infections for years. The segment closes by noting public health challenges and policy discussions, including comments about vaccination advocacy and the role of vaccine misinformation in public discourse.

“the measles virus is one of the most contagious known to science” - Scientific American

AI in Warfare: Acceleration, Targets, and Ethics

The second segment turns to geopolitics and technology, reporting that Anthropic’s Claude was used by the US in airstrikes against Iran, with the Wall Street Journal as the source. The piece describes how AI was involved in speeding up target identification, approval, and strike execution during a high-profile operation that included the bombing of a girls’ school and the deaths of many civilians. It situates this within a broader history of AI programs in military contexts, including a 2024 Plus972 magazine investigation about Israeli AI programs and kill-list generation, and the alleged use of systems to track targets and their families. Amid these developments, Defense Secretary Pete Hegseth threatened to cut ties with Anthropic if the Pentagon could deploy Quad as officials desired, while Anthropic opposed deployments that would enable domestic surveillance or autonomous weapons. The narrative also touches OpenAI’s defense contract following political statements about cutting ties with Anthropic, illustrating the domestic policy dimension of AI-enabled warfare.

The segment includes a direct ethical voice from the AI industry: “I have always believed that as we defend ourselves against our autocratic adversaries, we have to do so in ways that defend our democratic values and preserve our democratic values.” - Dario Amadei, CEO, Anthropic

“I have always believed that as we defend ourselves against our autocratic adversaries, we have to do so in ways that defend our democratic values and preserve our democratic values.” - Dario Amadei, CEO, Anthropic

Climate Acceleration: Warming Rises Faster

The climate segment reports a science letter in Geophysical Research Letters indicating Earth is currently about 2.5 degrees Fahrenheit warmer than in the late 19th century. More importantly, the study focuses on the acceleration of warming, finding the rate increased from roughly 0.4 degrees Fahrenheit per decade between 1970 and 2015 to about 0.6 degrees Fahrenheit per decade since then. If this acceleration continues, projections suggest the planet could reach 1.5 degrees Celsius (2.7 degrees Fahrenheit) of warming by 2030, with consequences including coral reef die-off, diminished fisheries, and shrinking freshwater supplies, threatening low-lying nations like the Maldives. The piece emphasizes that these acceleration trends align with existing climate models, yet they portend more rapid change that challenges global stewardship and policy responses. The host notes the relevance of these trends to broader discussions about planetary habitability and the future of Earth as a habitat.

“not great for maintaining a habitable planet” - Potsdam Institute for Climate Impact Research

From the Court of Sneakers: Why Squeaky Shoes Sing

The final science feature is a lighthearted exploration of sneaker acoustics. A Nature study investigated the stick-slip theory of squeaks in basketball shoes and showed that squeaks do not primarily arise from classic stick-slip motion. Instead, high-speed imaging and audio revealed that the squeaks result from ridges on the shoe sole that detach from the surface in a wave-like pattern, creating a sequence of micro-deta chments that interact with the air. By testing patches with various ridge geometries, the researchers demonstrated control over pitch, even producing a demonstration where patches played notes resembling the Imperial March from Star Wars. The researchers describe how slowing or speeding detachment along the ridges can modulate the audible effect, presenting design implications for footwear and acoustics. The section ends with a note that the work is a playful example of how fundamental physics can influence product design and consumer experience.

“we could have just made a graph, but that's no fun” - one of the researchers

Wrap-Up

As the episode closes, the host teases a future exploration of the hit show The Traitors and traitor-detection strategies, and credits the production team for Science Quickly. The show emphasizes the ongoing role of credible science journalism in helping listeners parse complex health, technology, and climate topics.