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An infrared thermography camera captured the increase in temperature in the supraclavicular region, which indicates greater BAT activity The cold room sat at precisely 18 degrees Celsius, cool enough to be uncomfortable but not quite cold enough to make you shiver. That temperature matters. For the 121 women sitting in that São Paulo research facility, wearing standardized clothing while infrared cameras tracked the heat blooming across their necks and collarbones, the line between [...]

The bullfrog farms of Brazil looked innocuous enough, nothing but ponds and concrete tanks scattered across São Paulo state. But beneath the water's surface lurked something far more dangerous than the amphibians themselves: a deadly fungal hitchhiker that would hop its way across continents. In 2012, Luisa Ribeiro and her colleagues at the State University of Campinas detected Bd-Brazil, a strain of the chytrid fungus Batrachochytrium dendrobatidis, in farmed bullfrogs. The fungus, [...]

This artist's illustration depicts 2025 MN45 — the fastest-rotating asteroid with a diameter over 500 meters that scientists have ever found. The asteroid is shown surrounded by many other asteroids, depicting its location within the main asteroid belt. The Sun and Jupiter are shown in the distance. 2025 MN45 is 710 meters (0.44 miles) in diameter, and it completes a full rotation every 1.88 minutes. The discovery was made using data from NSF–DOE Vera C. Rubin Observatory, jointly [...]

The quiet rhythm of waves along the shore now carries a warning that feels both urgent and intimate. At a scientific gathering in Montevideo, researchers outlined how climate driven sea level rise and relentless coastal urbanization are reshaping beaches at a pace that threatens biodiversity, livelihoods, and the very stability of coastal cities. Speaking at the FAPESP Day Uruguay symposium, marine scientist Omar Defeo of Uruguay's University of the Republic described a global process of [...]

A virus that kills young elephants in as little as 24 hours may have finally met its match. Scientists at Chester Zoo, the University of Surrey, and the Animal and Plant Health Agency have developed what they are calling the world's first vaccine targeting elephant endotheliotropic herpesvirus, a disease that has quietly devastated both captive and wild Asian elephant populations for decades. The vaccine, detailed today in Nature Communications, represents six years of painstaking work [...]

Deep in the Amazon rainforest, something unexpected is happening. While scientists have spent decades warning about climate change threatening the world's largest tropical forest, trees across the basin have been quietly getting bigger—a lot bigger. A comprehensive 30-year study published in Nature Plants reveals that average tree size in Amazon forests has increased by 3.3% each decade, with the largest trees showing the most dramatic growth spurts. The finding challenges [...]

It is the dry season's silent toll. A new study led by scientists at the University of São Paulo has shown that deforestation is responsible for nearly three-quarters of rainfall decline and 16 percent of temperature rise in the Amazon during this critical period. The research, published in Nature Communications , is the first to untangle the relative impacts of global climate change and local forest loss on the world's largest tropical rainforest. A measurable account of [...]

Human urine could help feed the world. A Stanford-led team has built a prototype that converts urine into crop fertilizer using solar energy, while also generating electricity and improving sanitation. The system, described in Nature Water , captures nitrogen in the form of ammonium sulfate, a widely used fertilizer, through a process that integrates waste heat from solar panels. This innovation could reduce reliance on fossil-fuel-based fertilizer production and expand access to both food [...]

The iconic saber-toothed tigers didn't vanish in a single catastrophic event—they slowly starved to death as their prey disappeared over millions of years. Research published in the Journal of Evolutionary Biology reveals that the decline of these fearsome predators began long before the end-ice age megafauna extinctions, driven by a gradual reduction in available prey that made their specialized hunting strategy unsustainable. The study challenges the popular notion that [...]