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Columbia scientists discover surprising link between serotonin and heart valve disease

Scientists have uncovered evidence that serotonin, the chemical best known for regulating mood, may also speed the progression of a common heart valve disease in some people. The research suggests that patients with degenerative mitral regurgitation who take SSRI antidepressants

Admin Recifes 15/07/2026 1

Self‑building molecular rings bring next‑generation drug delivery and smart materials clos

Rotaxanes are dumbbell-shaped mechanically interlocked molecules in which one or more ring-shaped molecules are threaded through a linear segment, known as the axle. To keep the ring from sliding off, two bulky groups, sometimes called stoppers, are added to the ends of the axle.

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Spider-like creatures help uncover the surprising origins of fatherhood

Citizen scientists have helped researchers solve a long-standing mystery about how parental care evolved in harvestmen. Using photos and observations from iNaturalist, scientists more than doubled the known cases of egg-guarding behavior and discovered that maternal and paternal

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Quantum-gravitational mechanism could explain the universe's homogeneity

Our universe is known to be remarkably homogeneous and isotropic. This essentially means that matter is distributed evenly throughout the universe and that it looks almost the same in all directions.

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Scientists strike invisible gold in the deep sea—locked inside fool's gold

Pyrite, an iron sulfide ore, is often known as fool's gold because its shiny metallic luster and pale brass-yellow color can easily fool the untrained eye into mistaking it for real gold. This time, however, 360 kilometers (220 miles) south of Tokyo, scientists have uncovered inv

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A 200-year-old physics experiment could help build future computers

Scientists at Nanyang Technological University in Singapore have discovered a surprisingly simple way to create exotic light structures called optical skyrmions using a 200-year-old optical effect known as the Poisson spot. Instead of relying on expensive, highly engineered mater

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First came the dead fish, then invasive plants. A year later and Lake Suchitlán’s pollutio

Fishers on El Salvador’s largest lake are still looking for answers after the die-off, with no explanation provided by the governmentFrom the village of Copapayo, Noel Avalos recalls the morning they ran to the shore of Lake Suchitlán, El Salvador’s main hydroelectric reservoir,

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Chemists make elusive carbon-bridged sandwich molecule once thought too strained to exist

Progress in chemistry is often gradual, with some of its most important advances taking years—sometimes decades—to unfold. A case in point is the discovery of a novel "ferrocenophane" from the class of compounds known as "sandwich molecules"—so named because of their particular s

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The family tree of viruses just grew, and it paves the way for a new approach to agricultu

Researchers have discovered that a group of viruses known to infect an agriculturally important plant pathogen has remained genetically stable for an astonishing four decades. The discovery of a disease-fighting virus that doesn't mutate at a rapid rate points the way toward new

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Where mainshocks strike may explain earthquake size patterns better than timing, data sugg

Japan is well known for its large earthquakes, but not all regions show the same patterns of earthquake activity. One way to understand which places tend to experience large or small earthquakes is the b-value, a key statistical measure long used by researchers to understand seis

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How tides and river water combine to amplify floods

Ocean tides push upstream along coastal rivers, in some cases reaching hundreds of kilometers (hundreds of miles) inland. These inland stretches are known as tidal rivers, and they're the scene of complex interactions between the river current and tidal oscillations. When rivers

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Astronomers uncover the earliest known signs of galaxy-building in action

Astronomers at Durham University have made a major advance in understanding how galaxies formed and evolved in the early universe. Using powerful new observations, the team discovered the most distant example ever found of a compact, star-forming structure at the heart of a galax

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