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For a long time, scientists have used to associate dogs’ aggressiveness solely with breed. However, a paradigm shift has occurred over the past decade, due to research linking behavioral profiles to factors such as dogs’ sex, age, metabolism, and hormonal patterns.  Now, based on a survey of 665 dog owners detailing the physical and behavioral features of their pet dogs, a team of researchers led by the University of São Paulo (USP) in Brazil has [...]

Capuchin monkeys are among only a few species of primates that use tools in their daily activities. For instance, they use stones as hammers and anvils to crack open cashew nuts and other hard foods. Although scientists have long thought that tool size correlates with food hardness, a new study led by the University of São Paulo has found that this is not always the case. By observing three populations of bearded capuchin monkeys (Sapajus libidinosus), and measuring food hardness, [...]

The Tiger Beach in Bahamas is famous not only for its pristine beauty, but also for being frequented by an animal that might scare some people, but is in fact a major tourist attraction: the Tiger shark (Galeocerdo cuvier). Since the sea is crystal clear and only five meters deep, the sharks – which often surpass three meters in length – can be seen easily, and are often drawn to the site by local tour operators who throw fish and other food in the water. Now, a team of [...]

The release of carbon caused by degradation in the Atlantic Rainforest could result in emissions that are more than 30 percent higher than those associated with climate change. This is the conclusion of a recent study published in the journal Science Advances, which clarifies carbon sequestration in the Atlantic Rainforest.  “We still know little about the factors that can lead forests to store more or less carbon,” said study co-author Renato Augusto [...]

Bullfrogs are considered the world’s leading invasive amphibian. The American bullfrog (Aquarana catesbeiana) is native to North America and was first brought to Rio de Janeiro in Brazil in 1935 to produce meat. Now, it is farmed throughout the South and Southeast of Brazil, but has also spread into the wild, negatively impacting local ecosystems by competing with native species for food and other resources, feeding on other frogs, as well as snakes, birds, and even some [...]

Bullfrogs are considered the world’s leading invasive amphibian. The American bullfrog (Aquarana catesbeiana) is native to North America and was first brought to Rio de Janeiro in Brazil in 1935 to produce meat. Now, it is farmed throughout the South and Southeast of Brazil, but has also spread into the wild, negatively impacting local ecosystems by competing with native species for food and other resources, feeding on other frogs, as well as snakes, birds, and even some mammals, and [...]

The Atlantic meridional overturning circulation (AMOC) is a vast system of ocean currents which carry warm water from the tropics into the North Atlantic ocean and transport cold water from the northern to the southern hemisphere, thus playing a major role in the regulation of the Earth’s climate. This system has collapsed in the past due to various natural factors, with its most recent collapse playing a key role in the last deglaciation. Since AMOC is currently threatened by [...]

A new longitudinal study led by the Federal University of ABC (UFABC) in Brazil has found that the Covid-19 pandemic has altered the way people perceive the passage of time. By surveying 900 volunteers via an online platform for five months in 2020 – the period with the strictest Covid-related lockdowns – the experts discovered that people experienced time passing more slowly during home confinement at the beginning of the pandemic, and associated this [...]

Although fever is a crucial response that helps organisms combat infections, it has a rather high cost in terms of energy expenditure. For this reason, through a process called “regulated hypothermia,” mammals and birds sometimes lower their temperature instead of raising it when conditions are unfavorable for the production of a fever, postponing the fight against infection until energy is once more abundant. A new study led by the São Paulo State [...]