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Em 2024: 5 notícias
Desde 1995: 5 notícias
Ants developed agriculture after the demise of the dinos, according to new analysis
Publicado em 08 outubro 2024
JUANA SUMMERS, HOST:
Agriculture is not a uniquely human endeavor. More than 20 lineages of animals farm, including termites, beetles and, perhaps most famously, the ants. Ants are prolific fungus farmers. Hundreds of ant species do it. A study out in the journal Science investigates the evolutionary origins of ant agriculture and estimates that it originated around 66 million years ago in the aftermath of the huge asteroid collision which dealt a death blow to the dinosaurs. Ted Schultz is [...]
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Dengue fever is — unfortunately — having a banner year. Can it be quelled?
Publicado em 23 julho 2024In the Americas alone, almost 10.4 million suspected cases of dengue, a mosquito-borne viral disease, were reported to the World Health Organization in 2024 as of the first week of July, an increase of 232% compared with the same period the year before. Peru is a case in point. When torrential rains started to fall there in 2023, a record-breaking dengue epidemic exploded shortly afterward. The case count is estimated at well over 100,000 so far this year. And dengue isn't just [...]ver notícia -
How old is the coffee bean? Researchers investigate
Publicado em 18 abril 2024The coffee bean that we know and love may be over 600,000 years old. That's according to a new study. PATRICK DESCOMBES: Arabica is actually coming from the mating of two parents, robusta and eugenioides, much like we are coming from our parents. A MARTÍNEZ, HOST: That's Patrick Descombes of Nestle. He was one of the researchers involved in the study. He says arabica is the result of a natural crossbreeding of plants that happened long before humans got involved. [...]ver notícia -
Milky Way black hole has 'strong, twisted' magnetic field in mesmerizing new image
Publicado emThe black hole at the center of our galaxy has been compared to a doughnut — and as it turns out, this doughnut has swirls. Scientists shared a mesmerizing new image on Wednesday, showing Sagittarius A* in unprecedented detail. The polarized light image shows the black hole's magnetic field structure as a striking spiral. "What we're seeing now is that there are strong, twisted, and organized magnetic fields near the black hole at the center of the Milky Way galaxy," [...]ver notícia -
With a million cases of dengue so far this year, Brazil is in a state of emergency
Publicado emIt was 3 a.m. on Feb. 6 when the dengue field hospital in Brasília temporarily shut its doors. The generator powering the medical facility had blown and the 29 members of the Brazilian Air Force in charge had to change it before they could see patients again. Medical professionals who'd been trained to care for dengue patients, they expected to attend to up to 600 people with suspected cases per day. In the first 24 hours after the doors opened on Feb. 5, they saw 1,300. The [...]ver notícia