Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that analyzes the motion of two nearby galaxy groups within their surrounding cosmic flow. The results indicate that the local universe is expanding more slowly than previously estimated, bringing measurements of nearby galaxies into close agreement with observations of the early universe. The findings also suggest that less dark matter is required to explain the dynamics of galaxies within these groups than previously assumed.
Galaxy-group motion suggests slower expansion in our cosmic neighborhood
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The climate measures currently in place are unlikely to meet Paris Climate Agreement targets. Whether further political measures can move us closer to the goal of limiting global warming to 1.5 degrees and combating climate [...]
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Texas busing programs that transported newly arrived immigrants to Democratic-led cities boosted President Donald Trump’s vote share in affected counties during the 2024 election, according to a new study from the USC Price School of [...]
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Indigenous people in the United States are at higher risk of fatal police violence in and around American Indian/Alaska Native (AIAN) reservations, according to the first comprehensive national study on the subject from researchers at [...]
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The growing use of AI-generated scientific and science-related content, especially on social media, raises important concerns: these texts may contain false or highly persuasive information that is difficult for users to detect, potentially shaping public [...]
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The Doomsday Clock—a symbolic device to signal an array of existential threats to the world since 1947—was recently moved to 85 seconds before midnight, the closest it has ever been to midnight. And that was [...]
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During armed conflicts in Latin America, state forces, insurgents, and paramilitaries systematically employed massacres, torture, abductions, and targeted killings to dismantle social structures. The Comisión para el Esclarecimiento de la Verdad, la Convivencia y la [...]
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The opening of trade borders under the North American Free Trade Agreement (NAFTA) in 1994 was accompanied by a significant increase in drug-related violence in Mexican regions that functioned as key corridors for drug trafficking. [...]
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Polls consistently show overwhelming support for measures like universal background checks and raising the minimum age for gun purchases. But Congress rarely acts. A new study published in Proceedings of the National Academy of Sciences [...]
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A study involving the UAB has analyzed the effect of foreign trade and immigration on the success of both right- and left-wing populist parties. The analysis reveals how the importation of products that require low-skilled [...]
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As members of the public increasingly turn to AI chatbots to understand their world, even subtle latent biases in the underlying models could affect public understanding of the present—and past.This post was originally published on [...]
