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In São Paulo, Brazil’s largest city, it is easier to find “giant” jararaca pit vipers (Bothrops jararaca) in a small fragment of Atlantic Rainforest surrounded by urban sprawl than in a nature reserve that is 16 times larger, even though more food is available for snakes in the latter. A new study suggests that the difference may be due to the number of predators in each habitat and not to the availability of food, as the researchers supposed at the outset. Their findings have been [...]

In an article published in the journal Environmental Pollution, Brazilian researchers showed that tree species Tipuana tipu have been successfully employed as a marker of atmospheric pollution by heavy metal and other chemical compounds in Sao Paulo, Brazil’s biggest metropolis. This Bolivia-native species commonly known as tipuana tree is ubiquitous in the city. Researchers at the University of São Paulo’s Bioscience Institute (IB-USP) and Medical School (FM-USP), in collaboration with [...]

Global warming could lead to the extinction of up to 10% of frog and toad species endemic to Brazil’s Atlantic Rainforest biome within about the next 50 years. The temperature and precipitation regimes predicted to occur between 2050 and 2070 will be lethal for species that are less well adapted to climate variation and inhabit certain areas of the Atlantic Rainforest. This is one of the findings of a study that analyzes the present and future distribution of anurans (tailless amphibians, [...]

Austrian physicist Erwin Schrödinger (1887-1961), one of the giants of contemporary science, considered "entanglement" the most interesting property in quantum mechanics. In his view, it was this phenomenon that truly distinguished the quantum world from the classical world. Entanglement occurs when groups of particles or waves are created or interact in such a way that the quantum state of each particle or wave cannot be described independently of the others, however far apart they [...]

Commercial antidepressants typically take two to four weeks to have a significant effect on a depressed patient. They are also inneffective in approximately 40% of the cases. Finding new drugs for depression that are fast-acting and have more lasting effects is the goal of research conducted by Brazilian scientists in São Paulo State in collaboration with Danish colleagues. Their study found that a single dose of cannabidiol in rats with symptoms of depression was highly effective, [...]

Throughout the alluvial plains of Amazonia, there are immense forests that are flooded for almost half the year. These Amazonian wetlands encompass a wide array of types of vegetation in or near stream gullies, including blackwater (igapó) and whitewater (várzea) inundation forest, swamp (pântano), white sand savanna (campina), and mangrove (mangue) types. According to a new study, the region’s wetlands are inhabited by 3,615 tree species — three times more than previously estimated, [...]