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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.

People run from bulls in Pamplona, Spain

Physics

‘Running of the bulls’ festival crowds move like charged particles

Researchers have studied the movements of thousands of people waiting for the opening of the San Fermín festival and found they behave like electrons circling in a magnetic field

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Technology

Nvidia’s Blackwell AI ‘superchip’ is the most powerful yet

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Venki Ramakrishnan
Health

Venki Ramakrishnan: The most promising ways to stop ageing

Video

Health

Cannabis vaping liquids contain lead and other toxic metals

News

Health

Intermittent fasting linked to a higher risk of heart disease death

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Health

Blood-clotting drug derived from pigs can now be made synthetically

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Humans

Mammoth carcass was scavenged by ancient humans and sabre-toothed cats

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tristan greene
Mind

How ketamine-assisted psychotherapy changed my life

Video

Space

Titan’s sand dunes may be made of smashed up small moons

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Mathematics

Mathematicians plan computer proof of Fermat’s last theorem

Fermat's last theorem puzzled mathematicians for centuries until it was finally proven in 1993. Now, researchers want to create a version of the proof that can be formally checked by a computer for any errors in logic

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Chemistry

Gold flecks make super-transparent glass fully opaque from one side

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Technology

Miniature furniture 3D printed using ink made from recycled wood

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Space

The strange phenomena visible during April’s total solar eclipse

Video

Space

Perfectly straight ridges may cover the poles of Saturn’s moon Titan

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