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Science (EUA) online
Em 2026: 0 notícias
Desde 1995: 8 notícias
The emergence and demise of giant sloths
Publicado em 22 de maio de 2025
The emergence of multi-tonne herbivores is a recurrent aspect of the Cenozoic mammalian radiation. Several of these giants have vanished within the past 130,000 years, but the timing and macroevolutionary drivers behind this pattern of rise and collapse remain unclear for some megaherbivore lineages. Using trait modeling that combines total-evidence evolutionary trees and a comprehensive size dataset, we show that sloth body mass evolved with major lifestyle shifts and that most terrestrial [...]
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Massive DNA sequencing effort reveals how colonization shaped Brazil’s genetic diversity
Publicado em 15 maio 2025New study identifies thousands of new variants related to diseasesver notícia -
Asteroid impact may have turned ants into fungus farmers 66 million years ago
Publicado em 03 outubro 2024Cataclysm that killed dinosaurs and shook up life on Earth likely paved the way for this mutually beneficial relationshipver notícia -
Scientific evidence that cats are liquids, and when ants started their fungus farms
Publicado em 03 outubro 2024First up this week, Online News Editor David Grimm joins host Sarah Crespi to talk about how cats think about their own bodies . Do cats think of themselves as a liquid, as much the internet appears to believe? New experiments suggest they may—but only in one dimension. Next, freelance producer Ariana Remmel is joined by Ted Schultz, a research entomologist at the Smithsonian Institution, to discuss the evolution of ant-fungus farming . It turns out, ants and fungus got [...]ver notícia -
Researcher steps on deadly vipers 40,000 times to better predict snakebites
Publicado em 15 maio 2024Science chats with João Miguel Alves-Nunes about his risky experimental approach, and how it could help save lives More than 5 million people are bitten by snakes every year, resulting in thousands of deaths and permanent disabilities. Yet despite advances in developing antivenoms, scientists still don't know why some snakes bite humans and others don't. João Miguel Alves-Nunes has developed an unusual—and some would say insane—way to find out. The [...]ver notícia -
Dengue is raging in Brazil. A promising local vaccine is at least a year away
Publicado emRecord-breaking outbreak, fueled by an unusually hot rainy season, is disproportionally affecting poor people When dengue started to circulate in his small town in the state of Rio Grande do Sul in Brazil, Fabio Vilella's first thought was that he should get his 13-year-old son vaccinated. Children are especially vulnerable, and his son had dengue before, which increases the risk of severe disease. But Vilella, an environmental biologist, soon made a startling discovery: Not a single [...]ver notícia -
Good News Against Dengue
Publicado em 07 fevereiro 2024I wanted to highlight some recent progress against dengue fever, which is a nasty mosquito-borne disease that has been quite difficult to treat. There really aren't any effective antiviral drugs against it; once you get dengue you pretty much have to ride it out. For the majority of people, that works out fairly well, with fever being the main symptom - at least the first time around. The problem is, the dengue virus exists in at least four serotypes (I think the official count is now [...]ver notícia -
Laser mapping reveals hidden structures in Amazon—with hints at thousands more
Publicado em 05 outubro 2023Model predicts where ancient people built ditches, wells, and geoglyphs throughout the rainforest regionver notícia