Researchers at the University of Wollongong and the construction company LUYTEN 3D announced they have developed the world’s first underwater 3D concrete printing system that works without using chemical accelerators.

 

Researchers at the University of Wollongong and the construction company LUYTEN 3D announced they have developed the world’s first underwater 3D concrete printing system that works without using chemical accelerators.

The system uses a single concrete mix that is designed to harden underwater through material engineering alone, removing the need for complex multi-stage processes.

Project leader Aziz Ahmed said their trials proved the solution is not only theoretically sound but also practical and ready for real-world use.

Testing showed that the concrete mix resists washout in water and keeps its structural strength while being printed underwater.

This technology could be applied to ports, offshore wind farms, and defense infrastructure, including possible submarine-related projects.

Disclaimer: Images are generated using AI for illustration purposes only.

#fblifestyle

All flags placed on the Moon are now "white" due to harsh ultraviolet radiation from the sun.

 

During the Apollo missions between 1969 and 1972, NASA astronauts planted six American flags on the Moon’s surface. Unlike Earth, the Moon has no atmosphere to filter ultraviolet (UV) radiation from the Sun. This exposes materials directly to intense solar radiation and extreme temperature swings.

Ultraviolet radiation gradually breaks down chemical bonds in pigments and fabrics. Over decades, the red and blue dyes in the nylon flags would likely have degraded significantly. Without atmospheric protection, fading would occur much faster than on Earth, leaving the fabric bleached and colorless.

In addition to UV exposure, the Moon experiences temperature extremes ranging from about +127°C during lunar day to −173°C at night. These repeated thermal cycles weaken materials over time. Some flags may also have been knocked down by rocket exhaust when lunar modules lifted off.

Orbital images suggest at least some flags are still standing, though their current color cannot be directly observed in detail. Scientists widely agree that they have likely faded substantially, possibly appearing mostly white today.

The fading flags illustrate how unforgiving the lunar environment is. Even simple fabric undergoes dramatic transformation under constant radiation and temperature stress.

#SpaceHistory #MoonMission #LunarScience #NASA

Rising from the desert landscape of the United Arab Emirates, Mars Science City is designed to resemble a small settlement on another planet.

 

Rising from the desert landscape of the United Arab Emirates, Mars Science City is designed to resemble a small settlement on another planet. Domed structures stretch across the sand, creating controlled environments where scientists can simulate the harsh conditions of Mars. Inside, researchers study food production, water recycling, and sustainable living systems that future astronauts might depend on during long missions.

The project is not just architectural spectacle; it is a testing ground for survival. By recreating isolation, extreme temperatures, and resource limitations, the UAE hopes to prepare for deeper space exploration. In the silence of the desert, Earth becomes a rehearsal stage for life beyond it.

Fact Fuel 

Australia is using drones to restore forests after devastating bushfires.

 

Australia is using drones to restore forests after devastating bushfires. Each AI-powered drone can plant up to 40,000 seeds per day using biodegradable seed pods containing native trees, nutrients, and protective coatings.

Guided by GPS, the drones identify optimal planting sites and navigate difficult terrain, making reforestation faster, safer, and more scalable than traditional methods.

This high-tech approach accelerates forest recovery, boosts carbon capture, and helps restore critical wildlife habitats.

Images are generated by AI and for demonstration purposes only.

Source: AirSeed Technologies, 2023.

#fblifestyle#DronesForGood #Reforestation

The Year-fee at a German public university runs around €600, the USA costs $43.000

 

The semester fee at a German public university runs around €300 to €400. For the semester. Not the year.

That's called the Semesterbeitrag. It covers admin costs, student union membership, and at most universities, a public transit pass for the semester. No tuition on top. That's it. College Board data puts average US private university tuition at $43,350 per year. Public university out-of-state: $30,780. Germany: €300 to €400 per semester.

Germany removed tuition fees across all 16 states by 2014. The policy covers international students too, including non-EU citizens. Worth knowing: Baden-Württemberg charges non-EU students €1,500 per semester, and TU Munich started charging non-EU students in 2024. But across most of Germany's 361 public universities, the fee structure is the same whether you're from Germany, India, Nigeria, or the US.

Living costs are the real number to plan for. DAAD estimates around €876 per month on average, covering rent, food, health insurance, and transit. There are also 2,693 English-language bachelor's and master's programs across German universities right now (DAAD, 2024), so the language barrier is real but negotiable, especially for grad school.

Share this with someone weighing US student debt against studying abroad. Germany's often not in the conversation until someone shows them the numbers.

#MSinGermany #StudyInGermany #GermanyEducation

Researchers at the Korea Institute of Energy Research (KIER) in Daejeon have developed a semi-transparent perovskite solar cell with 17.9% power conversion efficiency and 30% visible light transmittance

 

Researchers at the Korea Institute of Energy Research (KIER) in Daejeon have developed a semi-transparent perovskite solar cell with 17.9% power conversion efficiency and 30% visible light transmittance — meaning the panel lets through nearly a third of visible light (appearing as subtly tinted glass) while converting the remaining solar spectrum to electricity, making it commercially viable as a building-integrated photovoltaic window for skyscrapers, office towers, and residential high-rises. A 40-story office building fully glazed with KIER's solar glass generates enough electricity to power itself entirely. The building skin becomes the power plant.

The technical challenge of transparent solar cells is fundamental: photovoltaics convert photons to electricity, but visible light photons are exactly what makes glass transparent. KIER's solution uses a perovskite composition tuned to absorb ultraviolet and near-infrared wavelengths (invisible to human eyes) while transmitting visible wavelengths. The result is glass that appears only slightly darker than standard architectural glazing while converting the invisible portions of the solar spectrum — which represent 46% of total solar energy — into useful electricity. No visible solar panel. No architectural compromise.

South Korea has 2.4 million buildings with large glass curtain wall facades, consuming 25% of national electricity in lighting and climate systems. If 20% of that glass were replaced with KIER solar panels, the generated electricity would supply 8% of South Korea's total national consumption — from surfaces that were previously just letting heat in and requiring energy to offset.

KIER has partnered with LG and Hanwha for commercial production scale-up. Architectural certification for building codes in South Korea, the EU, and US is being sought simultaneously. The building that powers itself through its own windows is now an engineering product, not a concept.

Source: Korea Institute of Energy Research, Joule 2024

#TransparentSolar #BuildingIntegratedPV #SolarWindows #GreenBuilding #SolarInnovation #KoreaCleanTech

France has revived and upgraded its overnight train network, offering travelers private rooms, full beds, and sleeper cabins that allow people to cross countries while they sleep.

 

France has revived and upgraded its overnight train network, offering travelers private rooms, full beds, and sleeper cabins that allow people to cross countries while they sleep. The initiative is part of Europe’s push toward sustainable travel and reduced aviation dependence.

Modern sleeper trains feature soundproof cabins, charging ports, showers, and secure compartments. Passengers can board at night and wake up in a new city—skipping airports, long security lines, and high carbon emissions.

Officials say overnight rail is both environmentally friendly and time-efficient, especially for trips under 1,000 kilometers. Demand has surged as travelers prioritize comfort and climate-conscious choices.

The return of sleeper trains suggests the future of travel may lie not in speed alone—but in rest, efficiency, and sustainability.

#SustainableTravel #NightTrains #FranceRail #GreenTransport #FutureMobility