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You have probably seen leaf-cutter ants carrying bits of plants, maybe in a nature documentary, at a science museum or in the “Circle of Life” song at the beginning of the 1994 Disney animated film “The Lion King.” Those ants don't eat the leaves — instead they bring them back to their nests to feed a garden of fungi, which produce food for the ants. Researchers have now used DNA analysis to uncover just how long ants have been farming fungi, now [...]

Global scientists and campaigners are calling for immediate action on plastic’s impact on human health. Their demands come following the release of a new report which has shown that indoor environments could be a major source of microplastic pollution. In short, it means that plastic particles are easily inhaled and can quickly enter the brain. The research, led by Professor Dr Thais Mauad and Dr Luis Fernando Amato-Lourenco from the University of Sao Paulo and Freie University [...]

Microplastics continue to be found in some concerning parts of the human body. A new study published Sept. 16 in the JAMA Network Open journal explains how microplastics in the human brain can accumulate in part of the brain that controls an important part of our daily lives: how we smell.   Researchers in Brazil examined the olfactory bulbs of 15 cadavers and detected the presence of microplastics in the olfactory bulbs of eight of them. The olfactory bulbs, located at the bottom of [...]

Microplastics continue to be found in some concerning parts of the human body. A new study published Sept. 16 in the JAMA Network Open journal explains how microplastics in the human brain can accumulate in part of the brain that controls an important part of our daily lives: how we smell. Researchers in Brazil examined the olfactory bulbs of 15 cadavers and detected the presence of microplastics in the olfactory bulbs of eight of them. The olfactory bulbs, [...]

Study: Microplastics in the Olfactory Bulb of the Human Brain. Image Credit: MattL_Images / Shutterstock In a recent study published in the JAMA Network Open a group of researchers investigated the presence and characteristics of microplastics (MP) in the human olfactory bulb (OB), providing insight into potential pathways for microplastic translocation to the brain. Background MP pollution is a growing environmental concern, with MPs found in various human organs, including the lungs, [...]

Warming loaded the dice for fire weather — hot, dry conditions that leave forests ripe for burning — in Canada and in part of the Amazon last year, according to a new report. Scientists determined that climate change increased the odds of fire weather in Canada threefold and in the Amazon twentyfold. It is “virtually certain” that fires in both regions were larger as a result of warming, said report coauthor Chantelle Burton, a climate scientist with the [...]

Researchers now have unlocked the genome of the Arabica species and traced its origins to a natural mating between two other coffee species an estimated 610,000 to one million years ago in the forests of Ethiopia. That makes this species older than our own species Homo sapiens, which arose in Africa about 300,000 years ago. The researchers sequenced the genomes of 39 Arabica varieties, including a specimen from the 18th century, to create the highest quality genome to date of this species, [...]

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 other coffee species. “In other words, prior to any [...]

Brazil is experiencing an enormous outbreak of dengue fever, the sometimes fatal mosquito-borne disease, and public health experts say it is a harbinger of a coming surge in cases in the Americas, including Puerto Rico. Brazil’s Health Ministry warns that it expects more than 4.2 million cases this year, outstripping the 4.1 million cases the Pan-American Health Organization recorded for all 42 countries in the region last year. Brazil was due for a bad dengue year — numbers [...]