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(CNN) — Heavy drinking is associated with increased risk of a type of brain injury linked with memory and thinking problems. That's according to a new study in which researchers defined heavy drinking as eight or more alcoholic drinks per week. This study, which was published in the journal Neurology, comes when clinicians and public health advocates are raising awareness of alcohol use disorder and issues related to excessive alcohol consumption. To help people think about [...]

TRINDADE ISLAND, Brazil : The geology of Brazil's volcanic Trindade Island has fascinated scientists for years, but the discovery of rocks made from plastic debris in this remote turtle refuge is sparking alarm. Melted plastic has become intertwined with rocks on the island, located 1,140 km (708 miles) from the southeastern state of Espirito Santo, which researchers say is evidence of humans' growing influence over the earth's geological cycles. "This is new and [...]

Recent 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 [...]

Two new colorful species of fish have been found in Brazil's Amazon Basin -- and they are already at risk of disappearing due to extinction. The fish belong to a subfamily called South American darters. The discovery brings the known number of darter species to five. One species, Poecilocharax callipterus, is distinguished by its long, striking red-orange fins and a dark spot at the base of its tail. The other new species, Poecilocharax rhizophilus is the most miniature darter ever [...]

(CNN) — Los investigadores encontraron dos nuevas especies de peces coloridos en la cuenca del Amazonas, y ya se encuentran en la lista de especies en peligro de extinción. Los peces pertenecen a una subfamilia llamada pez ciprínido de agua dulce sudamericano. El descubrimiento eleva a cinco el número conocido de especies de ciprínidos de agua dulce. Los investigadores han encontrado una nueva especie de pez, el Poecilocharax callipterus, en la cuenca del [...]

Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.(CNN) Two new colorful species of fish have been found in Brazil's Amazon Basin -- and they are already at risk of disappearing due to extinction.The fish belong to a subfamily called South American darters. T he discovery brings the known number of darter species to five.One species, Poecilocharax callipterus, is distinguished by its long, [...]