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Heatwave: why the body becomes exhausted when nights stay hotSweating, humidity, the heart and kidneys: understanding the body’s limits in prolonged heat and MeteoLux’s new alert system.
France exports electricity: is it really independent?With net exports of 92.3 TWh in 2025, France has set an electricity record. But its reliance on oil, gas and uranium tells a different story about dependence.
Why Star Wars spacecraft don’t look like real rocketsStaged rockets, the heat of atmospheric re-entry, life on board and the speed of light: what physics really allows spacecraft to do.
Beneath the Moon, a pit is not enough to reveal an entire caveImages, radar and thermal measurements shed light on lunar cavities. But an entrance spotted from orbit reveals neither the extent of the underground nor whether it is habitable.
White roofs: what reflective paint can change in a buildingA light-coloured coating can limit the heat build-up on a roof. Its effect indoors also depends on the climate, insulation and the building.
Laika: why her 1957 flight was a first in orbitSputnik 2 put the first animal into orbit around the Earth. Flights had taken place before it, and no return was planned for the dog: the milestones of a historic mission.
Solar Orbiter: tracing the origin of the solar windSolar Orbiter has linked a magnetic deformation observed in the solar wind to its source on the Sun. The discovery sheds light on magnetic reconnection and space storms.
Batteries: how long on the grid?New battery storage capacity deployed rose by 40% in 2025, according to the IEA. Power, duration and use help explain these installations.
Henri Tudor: the man who made electricity an everyday serviceFrom Rosport to Echternach, Henri Tudor refined electric accumulators before helping bring lighting to towns. The story of a Luxembourg inventor who became a European industrialist.
Electricity grids: ESA seeks useful services on the groundA call opened on 29 September brings together space data and the needs of electricity grids. Luxembourg companies can prepare their applications.
DAVINCI: why NASA is preparing a probe for Venus’s 465°C heatA DAVINCI capsule has withstood 465°C six times in ground tests. NASA wants to understand how Venus evolved and whether it once had liquid water.