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What makes a star a star? A strange 'in‑between' celestial object is testing astronomers'

A star called TOI-2155 lies around 1,350 light-years (839 trillion miles) from Earth. It is a little bigger, heavier and hotter than the sun, and it is not particularly interesting or unusual in itself.

Admin Recifes 15/07/2026 1

Dynamic black holes may obey Hawking-style thermodynamics with an alternative entropy meas

Of the known things in the universe, black holes are among the most extreme. They pack huge amounts of mass densely into a small area, producing gravity that is so strong that even light cannot escape. To describe their properties, physicists have relied on complex equations from

Admin Recifes 15/07/2026 2

Light flips bacterial signaling enzyme between two shapes, unlocking how signals travel

Researchers at the University of Bayreuth and Forschungszentrum Jülich have demonstrated that specific light-sensitive enzymes—so-called sensor histidine kinases (SHKs)—transmit their signal through a light-controlled change in asymmetry. With their new study, the researchers con

Admin Recifes 15/07/2026 2

Instant digital rewards may make hard thinking feel less worthwhile

Imagine opening a difficult book in a quiet room. The first page is dense. You read one paragraph, then reread it. Nothing "clicks" yet. Your brain is doing what learning often requires: spending effort before the reward arrives. Then your phone lights up. One thumb movement, and

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Diffractive networks enable optical information transfer through random and unknown diffus

The transmission of optical information through random scattering media is a major challenge in optics, biomedical imaging, telecommunications and remote sensing. When light passes through a turbid or diffusive medium, such as biological tissue or a randomly structured optical ma

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Weatherwatch: How thunder is made

Sound of thunder varies depending on distance of listener from lightning as atmosphere muffles and absorbs sound A bolt of lightning heats the air almost instantly to as high as 30,000C, causing explosive expansion and a supersonic shock wave that becomes thunder. What that thund

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Cosmic neutrino 'whispers' may surface in 5,000-day Super-Kamiokande signal

Neutrinos: They have no electric charge, pass through matter like a ghost and are so light they were initially thought to have zero mass. These are just some of the traits that make them so difficult to detect. Research on neutrinos requires massive underground observatories far

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The discovery of an ancient child's skull sheds light on the early prehistoric farmers of

Researchers from the University of Bergen have uncovered the remains of a 4,000-year-old child in a cave site on Norway's west coast. "The find offers rare and important insight into the first agricultural population in Norway, and we hope that analysis of the bone material will

Admin Recifes 15/07/2026 1

Plug-and-play single-photon source can work at room temperature

The Korea Research Institute of Standards and Science (KRISS) has developed a room-temperature single-photon source built into a compact 19-inch rack-mounted device that operates without cryogenic cooling. Designed as a plug-and-play system that works as soon as it is powered on,

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Overcrowded and underfunded: Trump’s cuts to national parks threaten the US’s ‘best idea’

This summer, Yosemite national park has been rife with traffic jams and throngs of visitors. Can these popular national treasures withstand a future of strained resources?On a crisp, sunny morning at the end of June, dappled light filtered through the canopy of an ancient grove o

Admin Recifes 15/07/2026 1

A nearby black hole as a window into the early universe

An international team led by Stefanie Komossa from the Max Planck Institute for Radio Astronomy (MPIfR) in Bonn has studied a galaxy that has been shining exceptionally brightly in the radio regime for more than eight years. Although it is only 1.8 billion light-years away from u

Admin Recifes 15/07/2026 1

Euclid discovers the most ancient quasars in the universe

The European Space Agency's Euclid space telescope has discovered 31 of the most ancient quasars ever found. Two of these giant and dazzling galaxy cores, powered by gargantuan black holes, are the earliest quasars yet observed in cosmic history. They shone with the light of a tr

Admin Recifes 15/07/2026 2

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