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Explore the most exciting new ideas and emerging concepts in science, health, technology and the environment with 91av’s exclusive in-depth articles, interviews and long reads.

Life

All living things emit an eerie glow that is snuffed out upon death

Our bodies emit a stream of low-energy photons, and now experiments in mice have revealed that this ghostly glow is cut off when we die

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Environment

Europe increasingly vulnerable to hailstones the size of golfballs

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Space

Failed Soviet probe will soon crash to Earth – and we don’t know where

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Environment

Record heat in 2023 and 2024 may just have been natural variability

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This new Picture of the Month from the NASA/ESA/CSA James Webb Space Telescope features an astounding number of galaxies. The objects in this frame span an incredible range of distances, from stars within our own Milky Way, marked by diffraction spikes, to galaxies billions of light-years away.?? The star of this image is a group of galaxies, the largest concentration of which can be found just below the centre of this image. These galaxies glow with white-gold light. We see this galaxy group as it appeared when the Universe was 6.5 billion years old, a little less than half the Universe???s current age. More than half of the galaxies in our Universe belong to galaxy groups like the one pictured here. Studying galaxy groups is critical for understanding how individual galaxies link up to form galaxy clusters, the largest gravitationally bound structures in the Universe. Belonging to a galaxy group can also alter the course of a galaxy???s evolution through mergers and gravitational interactions. The galaxy group pictured here is the most massive group in what???s called the COSMOS-Web field. COSMOS stands for Cosmic Evolution Survey. This survey has enlisted several telescopes, including Webb, the NASA/ESA Hubble Space Telescope, and ESA???s XMM-Newton space observatory to gaze deeply at a single patch of sky.?? COSMOS-Web aims to understand how massive structures like galaxy clusters came to be. Webb???s infrared capabilities and sensitive instruments have pushed the search for galaxy groups farther back into cosmic history, revealing galaxy groups as far back as when the Universe was only 1.9 billion years old ??? just 14% of its current age. This image combines infrared data from Webb???s Near-InfraRed Camera (NIRCam) instrument with further infrared observations from the Hubble Space Telescope. The X-ray data, shown in purple, highlights the presence of hot gas concentrated within the X-ray galaxy group. These X-ray data come from ESA???s XMM-Newton space observ

Space

Colourful group of galaxies offers peek into history of the universe

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Environment

Major US cities like New York and Seattle are sinking at a rapid rate

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Indiana Jones and Raiders of the Lost Ark film still
Humans

Indiana Jones vs Lara Croft: Ranking the best fictional archaeologists

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Mathematics

The maths that tells us when a scientific discovery is real – or not

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Health

Dementia cases are rising faster in China than the rest of the world

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Earth

99.999 per cent of the deep seabed remains unexplored by humans

Deep-sea submersibles have been diving for decades, but records show that we have still only explored a tiny area of the deep seabed, which makes up the majority of Earth's topography

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Life

The birds upending our idea of shared parenting

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Life

Strange microbes give clues to the ancestor of all complex life

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Technology

Concerns raised over AI trained on 57 million NHS medical records

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Physics

Nothing is stronger than quantum connections – and now we know why

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