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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 [...]

By Sandee LaMotte, CNN (CNN) — Tiny plastic shards and fibers were found in the nose tissue of human cadavers, according to a small new study. The threads and microplastic pieces were discovered in the olfactory bulb, the part of the nose responsible for detecting odors that sits at the base of the brain. “Once present in this structure, there can be translocation to other regions of the brain,” said lead study author Luís Fernando Amato-Lourenço, a [...]

That coffee you slurped this morning? It’s 600,000 years old. Using genes from coffee plants around the world, researchers built a family tree for the world’s most popular type of coffee, known to scientists as Coffea arabica and to coffee lovers simply as “arabica.” The researchers, hoping to learn more about the plants to better protect them from pests and climate change, found that the species emerged around 600,000 years ago through natural crossbreeding of two [...]

(CNN) — The Amazon rainforest is on course to reach a crucial tipping point as soon as 2050, with devastating consequences for the region and the world’s ability to tackle climate change, according to a study published Wednesday. The Amazon has proven resilient to natural changes in the climate for 65 million years, but deforestation and the human-caused climate crisis has brought new levels of stress and could cause a large-scale collapse of the forest system within the [...]

(CNN) — From deep in the Amazon rainforest, two dozen previously unknown pre-Columbian earthworks have been brought to light — and more than 10,000 such constructs may still be waiting to be discovered, according to new research. Across the Amazon basin, rainforests spread their leafy boughs over millions of kilometers. In the ground far below the treetops are ancient, long-hidden remnants of human habitation. They are preserved as ditches, paths and wells, sometimes forming [...]