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La Russie dévoile un moteur plasma révolutionnaire, capable de rejoindre Mars en un mois

26 janvier 2026 à 12:40

La Russie reviendrait-elle dans la course technologique mondiale ? Rosatom, l’agence nucléaire russe, affirme en tout cas avoir mis au point un moteur spatial d’un nouveau genre, capable de propulser un vaisseau vers Mars en seulement un à deux mois. Une avancée technologique majeure qui, si elle se …

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Strong v swole: the surprising truth about building muscle

26 janvier 2026 à 10:00

Traditional bodybuilding advice has been to push workouts to the point of failure, and that soreness is an indicator of effectiveness. But recent studies show there’s another way

Until pretty recently, the conventional wisdom about building muscle was that it worked via a system you might think of as “tear and repair” – the idea being that working out causes microtears in the muscle fibres, which trigger the body’s repair processes, encouraging the muscles to come back bigger and stronger.

That’s why many old-school trainers will tell you that there’s no gain without pain, and why a lot of bodybuilding advice includes increasingly byzantine ways of pushing your biceps and triceps to the point where you can’t do another repetition: the more trauma you can cause, the thinking goes, the more “swole” you can become.

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© Composite: Guardian Design; Husam Cakaloglu; SCIEPRO; Bogdan Nicolaescu/Getty Images

© Composite: Guardian Design; Husam Cakaloglu; SCIEPRO; Bogdan Nicolaescu/Getty Images

© Composite: Guardian Design; Husam Cakaloglu; SCIEPRO; Bogdan Nicolaescu/Getty Images

Spider monkeys found to share ‘insider knowledge’ to help locate best food

26 janvier 2026 à 06:00

Researchers observed the primates switching social groups and passing information on where to find the ripest fruit

Spider monkeys share tips about where to find food by changing their social groups in a “clever system for sharing insider knowledge”, research has shown.

They were observed to frequently switch subgroups of three or more individuals in a way that enabled them to share information about the location of fruit trees and timing of when they would ripen.

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© Photograph: Marco Ugarte/AP

© Photograph: Marco Ugarte/AP

© Photograph: Marco Ugarte/AP

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