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Carnivora
Em 2023: 1 notícias
Desde 1995: 3 notícias
Hollow bones that let dinosaurs become giants evolved at least three times independently, shows study
Publicado em 07 março 2023
Dinosaurs as big as buses or five-story buildings would not be possible if their bones were dense and heavy like ours. Like present-day birds, dinosaurs had hollow bones with inner structures known as air sacs, which made their skeletons lighter and less dense. These structures were apparently so advantageous that they emerged at least three times during the evolution of dinosaurs and pterosaurs (flying reptiles), according to a study described in Scientific Reports.
"Less dense [...]
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First genetic sequencing of Brazilian pit viper is completed
Publicado em 17 agosto 2021Researchers describe the genome of Bothrops jararaca and suggest the origin of genes responsible for toxins in its venom. Credit: Rafael Marques Porto/Instituto Butantan A group led by researchers at Butantan Institute and funded by São Paulo Research Foundation—FAPESP has completed the first sequencing of a Brazilian snake's genome. The study is reported in an article published in the journal PNAS. It suggests that the nine genes that encode toxins produced by the jararaca [...]ver notícia -
Researchers identify genes linked to sex differentiation in giant Amazon fish
Publicado em 26 junho 2019Brazilian and German scientists have completed a collaborative project to sequence and analyze the whole genome ofArapaima gigas, a giant freshwater fish known in Brazil as pirarucu and elsewhere as arapaima or paiche. Its growth rate is the fastest among known freshwater fish species. Its natural distribution covers most of the Amazon River basin in Peru and Brazil. The research led to discoveries that help determine sex at an early stage, facilitating the separation of female and male fry [...]ver notícia