First up on this week’s podcast, we hear about the skewed perception of our own hands, extremely weird giant viruses, champion regenerating flatworms, and more from Newsletter Editor Christie Wilcox
Pollution cuts have diminished “ship track” clouds, adding to global warming
Tropical forests host an unusually high diversity of tree species. Strong interactions between individuals are hypothesized to create these patterns. A tree is more likely to survive when surrounded by different tree species with different resource needs, diseases, and herbivores. Kalyuzhny et al. found patterns consistent with this mechanism in a long-term forest plot in Panama. Adult trees in this site are more distant from members of their own species than from other species and more distant than would be expected by chance or by the limits of seed dispersal. This study shows that distances between conspecifics are maintained in adult trees, helping to explain the high diversity of tropical forests.
The advent of social media forever changed how we consume news. At least half of Americans rely on it for news, and Facebook (owned by parent company Meta) is the most popular. Meta’s Facebook and Instagram platforms are funded through advertisements and generate more revenue when users spend more time on their platforms. To make platforms alluring and increase screen time, tech companies operate on business models that incentivize algorithms that are designed to elevate eye-catching content to the top of users’ feeds—content that captures attention and may go “viral” by stimulating “engagement” through comments, likes, and resharing.
Deep mantle waves from continental rifting trigger mysterious kimberlite volcanoes
Probe clears Marc Tessier-Lavigne of misconduct but criticizes lab culture and lack of “appetite” for corrections
A-bomb architect “was no Einstein,” historian says, but he did Nobel-level work on black holes
Huge strides have been made in the development of machine-learning algorithms to generate what is commonly called artifi cial intelligence (AI). Looking to the forefront of how AI is being used in science and society reveals many benefi ts, as well as grand challenges, that must be addressed.
Despite advances in molecular biology, genetics, computation, and medicinal chemistry, infectious disease remains an ominous threat to public health. Addressing the challenges posed by pathogen outbreaks, pandemics, and antimicrobial resistance will require concerted interdisciplinary efforts.
Amateur astronomer Koichi Itagaki is one of the most prolific supernova hunters of all time
Half-billion-year-old tunicate from western Utah “looks like it died yesterday”
Subtle shifts in stellar signals reveal pervasive waves from mergers of giant black ho
Scientists are learning how to cryopreserve living tissues, organs, and even whole organisms, then bring them back to life
Mock embryos created by multiple groups recapitulate developmental events beyond implantation
A European space telescope sets off to discover the nature of dark energy—the biggest ingredient in the universe
An MIT class exercise suggests AI tools can be used to order a bioweapon, but some are skeptical
For most of history, the only lights made by humans were naked flames. Daily life was governed by the times of sunrise and sunset, outdoor nighttime activities depended on the phase of the Moon, and viewing the stars was a common and culturally important activity. Today, the widespread deployment of outdoor electric lighting means that the night is no longer dark for most people—few can see the Milky Way from their homes. Outdoor lighting has many legitimate uses that have benefited society. However, it often leads to illumination at times and locations that are unnecessary, excessive, intrusive, or harmful: light pollution.
Data on shark populations in coral reefs raise concern and hope for recovery
Sharks and their relatives are some of the most threatened vertebrates on Earth, with approximately one-third estimated or assessed as threatened with extinction (1). This is a major problem because as predators that help keep the food web in balance, these animals play a variety of vitally important ecological roles (2) and in doing so help to keep healthy many ecosystems that humans depend on. Coral reefs provide homes for countless fish species that are vital for fisheries and are therefore an especially important ecosystem for humans—and one where the decline of shark populations seems to be especially acute
At Brooklyn’s Green-Wood Cemetery the living get as much attention as the dead. Groundskeepers maintain the 478-acre historic landmark as an arboretum and habitat for more than 200 breeding and migratory bird species. But many visiting wildlife lovers aren’t interested in those native birds. They’re at the entryway, their binoculars trained on the spire atop its Gothic Revival arches. They’ve come to see the parrots.
When dangerous heat waves hit cities, better risk communication could save lives
Exposure to extreme heat can damage the central nervous system, the brain and other vital organs, and the effects can set in with terrifying speed, resulting in heat exhaustion, heat cramps or heatstroke. It also exacerbates existing medical conditions such as hypertension and heart disease and is especially perilous for people who suffer from chronic diseases. The older population is at high risk, and children, who may not be able to regulate their body temperatures as effectively as adults in extreme conditions, are also vulnerable.
The minds of social species are strikingly resonant
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