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Thousands of Ancient Structures May Lay Hidden Beneath The Amazon : ScienceAlert
Publicado em 10 outubro 2023
Few places on Earth shape our impression of a pristine environment like the heart of the Amazon. For 6.7 million square kilometers, virtually every patch of soil, every leaf, every pool of water bustles and blooms with a wilderness that defies taming.
Yet amid the weave of tree roots and rotting vegetation, hidden by layers of dirt and the chaos of greenery, there is mounting evidence of human influence that dates back thousands of years.
In a new study, remote-sensing scientist Vinicius [...]
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One Type of Exercise Could Alleviate And Even Delay Alzheimer’s Symptoms : ScienceAlert
Publicado em 06 julho 2023Working on your muscles could help delay the onset of Alzheimer’s symptoms, researchers have revealed. Researchers from the Federal University of São Paulo and the University of São Paulo in Brazil have uncovered strong evidence that resistance training – where muscles are worked against a weight or a force – could have significant consequences for the brains of dementia patients. Before you hurriedly renew your gym membership or break [...]ver notícia -
Refined carbs and meat driving global rise in type 2 diabetes, study says
Publicado em 19 abril 2023Editor’s Note: Sign up for CNN’s Eat, But Better: Mediterranean Style. Our eight-part guide shows you a delicious expert-backed eating lifestyle that will boost your health for life. Gobbling up too many refined wheat and rice products, along with eating too few whole grains, is fueling the growth of new cases of type 2 diabetes worldwide, according to a new study that models data through 2018. “Our study suggests poor carbohydrate quality is a leading driver of [...]ver notícia -
One of the Luckiest Lightning Strikes Ever Recorded
Publicado emBrazilian researchers captured on camera the moment when lightning rods on buildings released an upward discharge to attract incoming lightning. Benjamin Franklin invented lightning rods in the 18th century, and the devices have been protecting buildings and people from the destructive forces of lightning ever since. But the details of how lightning rods function are still the subject of scientific research. Although modern lightning protection systems involve extra equipment that makes [...]ver notícia -
‘Horrifying’ Plastic Rocks Emerge in Remote Island Paradise : ScienceAlert
Publicado emThere are few places on Earth as isolated as Trindade island, a volcanic outcrop a three- to four-day boat trip off the coast of Brazil. So geologist Fernanda Avelar Santos was startled to find an unsettling sign of human impact on the otherwise untouched landscape: rocks formed from the glut of plastic pollution floating in the ocean. Santos first found the plastic rocks in 2019, when she traveled to the island to research her doctoral thesis on a completely different topic – [...]ver notícia -
Scientists Find Dwarf Planet With an ‘Impossible’ Ring, And They’re Unsure How It Exists : ScienceAlert
Publicado em 10 fevereiro 2023Rings in the Solar System are not exactly rare. Half the planets have them, and others may have in the past. Some asteroids have rings, as does the dwarf planet Haumea. Even the Sun has rings of a sort. Now astronomers have found an entirely new ring system. Only this one has left them scratching their heads, as it’s unlike anything else in the Solar System. Quaoar, a small dwarf planet that hangs out in the Kuiper Belt beyond Pluto, is also circled by a dense ring – [...]ver notícia -
Quaoar has a ring instead of a moon, and scientists don’t know why
Publicado em 09 fevereiro 2023Recent telescope data revealed that a small planet in the far reaches of our solar system has a dense ring round it. And scientists are baffled as to why. The planet, Quaoar, is one of roughly 3,000 small planets that orbit the sun beyond Neptune, and at 690 miles (1,110-kilometers) wide, it’s about the seventh largest, with Pluto and Eris ranking as the biggest. Observations of Quaoar made between 2018 and 2021 revealed that the planet has a ring sitting farther away from it than [...]ver notícia -
There’s a Ring Around This Dwarf Planet. It Shouldn’t Be There
Publicado em 09 fevereiro 2023Quaoar, a small world beyond Neptune has a ring like the ones around Saturn. But calculations suggest there should be none. A small icy world far beyond Neptune possesses a ring like the ones around Saturn. Perplexingly, the ring is at a distance where simple gravitational calculations suggest there should be none. “That’s very strange,” said Bruno Morgado, a professor at the Federal University of Rio de Janeiro in Brazil. Morgado is the lead author of a paper published [...]ver notícia -
Dwarf planet Quaoar has a weirdly big ring of debris encircling it
Publicado em 08 fevereiro 2023The dwarf planet Quaoar, which sits beyond Neptune in our solar system, appears to have a ring of debris around it that is much further out than was thought possible. “We have observed a ring that shouldn’t be there,” says Bruno Morgado at the Federal University of Rio de Janeiro in Brazil. Until now, every ring or orbiting moon observed by astronomers has obeyed a limit put forward by astronomer Édouard Roche in 1848 that relates to its [...]ver notícia -
Dogs Can Be Aggressive For Lots of Reasons, And One of Them Is You : ScienceAlert
Publicado em 26 janeiro 2023While some dog breeds have unfortunate reputations for being more aggressive than others, veterinarians and other animal experts have long been skeptical about this. A new study of 665 domestic dogs (Canis familiaris) in Brazil also points towards factors other than breed having stronger influences over this ‘problematic’ behavior. “The results highlight something we’ve been studying for some time: behavior emerges from interaction between the animal and its [...]ver notícia