
Why did Spain and Portugal go dark?
Authorities are still trying to understand what triggered the massive power outage that left the majority of the Iberian Peninsula without electricity on Monday. To understand what might have been at play, and whether there's any truth to claims that renewable energy sources were to blame, Ian Sample hears from Guardian energy correspondent Jillian Ambrose. And Guardian European community affairs correspondent Ashifa Kassam explains what it was like to experience the blackout and how people reacted
'Shipwrecked in the 21st century': how people made it through Europe's worst blackout in living memory
Support the Guardian: theguardian.com/sciencepod
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When is the next full moon? June's Strawberry Moon rises Tuesday night
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Eviden-built JUPITER supercomputer listed as the most powerful system in Europe and 4th worldwide
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JUPITER, unlocking a new era to accelerate Europe's scientific breakthrough As Europe's most powerful HPC and AI system, JUPITER is unlocking a new era of scientific and technological advancement. With the capability to perform 1 quintillion double-precision operations per second once fully operational, this groundbreaking supercomputer is already surpassing 790 petaflops—a key milestone in tackling today's most complex challenges and strengthening Europe's technological leadership. From dramatically improving extreme weather forecasts to accelerating breakthroughs in climate science, sustainable energy, AI, quantum research, and structural biology, JUPITER will empower researchers, industries, public organizations across Europe to drive innovation at an unprecedented scale. Built by the ParTec-Eviden consortium, the system has been procured by the European supercomputing initiative EuroHPC Joint Undertaking (EuroHPC JU) and is operated by the Jülich Supercomputing Centre (JSC). The JUPITER Booster partition, supplied by Eviden and based on its BullSequana XH3000, is equipped with around 24,000 NVIDIA GH200 Grace Hopper Superchips, which are optimized for highly parallel applications – such as training AI models, Large Language Models or numerically demanding simulations. JUPITER is also setting new standards in terms of energy efficiency – with more than 60 billion floating point operations per watt, JUPITER is the most efficient computer of Exascale-scale systems in the world. Besides its highly efficient Direct Liquid Cooling system provided by Eviden, JUPITER is also designed to use the waste heat generated in operation to heat buildings and will be integrated into the Jülich campus heating network. Eviden leading the Green500, showcasing its long-term Commitment to sustainable computing Eviden leading the Green500 for the second edition in row, with the only two systems – JUPITER's JEDI partition (#1 for the third time) and ROMEO – above 70 billion floating point operations per watt (GFlop/Watt)1, is the recognition for years of innovation towards more sustainable technologies. While the need for HPC and AI is growing, their energy demands is also moving exponentially, raising critical sustainability and efficiency challenges. Eviden has been addressing these challenges for years, through continued innovation in system architecture, Direct Liquid Cooling, and software optimization to ensure scalable, responsible growth. Emmanuel Le Roux, SVP, Global Head of Advanced Computing, Eviden, Atos Group said 'We are extremely proud to see Eviden-built systems still the top first spots of the Green500 and JUPITER listed as the 4th most powerful AI supercomputer in the world. Having delivered JUPITER and its Modular Data Center in 9 months is a major achievement and we look forward to seeing it reach its full exascale capacity once fully operational. These TOP500 and Green500 results are a strong recognition of Eviden's global role in the HPC and AI landscape, reinforcing our leadership across Europe, LATAM, and India — and our continued commitment to building greener, more efficient systems that will shape the next era of computing.' *** About Eviden Eviden is the Atos Group brand for hardware and software products with c. € 1 billion in revenue, operating in 36 countries and comprising four business units: advanced computing, cybersecurity products, mission-critical systems and vision AI. As a next-generation technology leader, Eviden offers a unique combination of hardware and software technologies for businesses, public sector and defense organizations and research institutions, helping them to create value out of their data. Bringing together 4,200 world-class talents and holding more than 2,100 patents, Eviden provides a strong portfolio of innovative and eco-efficient solutions in AI, computing, security, data and applications. About Atos Group Atos Group is a global leader in digital transformation with c. 72,000 employees and annual revenue of c. € 10 billion, operating in 68 countries under two brands — Atos for services and Eviden for products. European number one in cybersecurity, cloud and high-performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos is a SE (Societas Europaea) and listed on Euronext Paris. The purpose of Atos is to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence. Across the world, the Group enables its customers and employees, and members of societies at large to live, work and develop sustainably, in a safe and secure information space. Press contact Constance Arnoux – – +33 6 44 12 16 35 1 A higher GFlop/watt rating means the supercomputer performs more calculations using less electricity, resulting in greater efficiency that is both better for the environment and cheaper to operate. Attachment PR - Eviden-built JUPITER supercomputer listed as the most powerful system in Europe and 4th worldwide
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NVIDIA Powers Europe's Fastest Supercomputer
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Among the top five systems on the TOP500 list of the world's fastest supercomputers, JUPITER is the most energy efficient, at 60 gigaflops per watt. Comprising nearly 24,000 NVIDIA GH200 Grace Hopper Superchips and interconnected with the NVIDIA Quantum-2 InfiniBand networking platform, JUPITER is expected to reach over 90 exaflops of AI performance and is based on Eviden's BullSequana XH3000 liquid-cooled architecture. JUPITER also incorporates NVIDIA's full stack of software for optimized performance. 'AI will supercharge scientific discovery and industrial innovation," said Jensen Huang, founder and CEO of NVIDIA. 'In partnership with Jülich and Eviden, we're building Europe's most advanced AI supercomputer to enable the leading researchers, industries and institutions to expand human knowledge, accelerate breakthroughs and drive national advancement.' Built for Scientific Breakthroughs Hosted by the Jülich Supercomputing Centre at the Forschungszentrum Jülich facility in Germany, JUPITER is owned by the EuroHPC Joint Undertaking. 'With JUPITER's extreme performance, Europe has taken a giant leap into the future of science, technology and sovereignty,' said Anders Jensen, executive director of the EuroHPC Joint Undertaking. 'JUPITER's computing power will serve as a catalyst for scientific discovery, propelling foundational research across the continent in fields as diverse as climate modeling, energy systems and biomedical innovation.' 'JUPITER is a landmark achievement for European science and technology,' said Thomas Lippert, codirector of the Jülich Supercomputing Centre. 'Powered by NVIDIA's accelerated computing and AI platforms, JUPITER is advancing the frontier of foundation model training and high-performance simulation, enabling researchers across Europe to tackle challenges of unprecedented complexity.' 'JUPITER will substantially advance quantum algorithm and hardware development,' added Kristel Michielsen, codirector of the Jülich Supercomputing Centre. 'Hybrid quantum HPC-computation will profit from powerful tools such as the NVIDIA CUDA-Q platform and the NVIDIA cuQuantum software development kit.' 'JUPITER's launch is not just an extraordinary technical success — delivering an exascale machine and Julich's modular data center in less than nine months — it marks a pivotal moment for European high-performance computing,' said Emmanuel Le Roux, senior vice president and global head of advanced computing at Eviden, Atos Group. 'It clearly demonstrated the technological leadership of the European Eviden-led consortium, which designed, built and delivered this world-class system.' Early testing of JUPITER was conducted with the Linpack benchmark, which was also used to determine the TOP500 ranking. The JUPITER supercomputer represents a new generation of computing systems, uniting NVIDIA's end-to-end software stack to solve challenges in areas including: Climate and weather modeling: Enables high-resolution, real-time environmental simulations and visualization, using the NVIDIA Earth-2 open platform. This contributes to global community initiatives like the Earth Virtualization Engines project, which aims to create a digital twin of the Earth to better understand and address climate change. Quantum computing research: Advances quantum algorithm and hardware development with powerful tools such as the NVIDIA CUDA-Q™ platform and the NVIDIA cuQuantum software development kit. Computer-aided engineering: Reinvents product design and manufacturing through AI-driven simulation and digital twin technologies, powered by the NVIDIA PhysicsNeMo™ framework, NVIDIA CUDA-X™ libraries and the NVIDIA Omniverse™ platform. Drug discovery: Streamlines the creation and deployment of AI models vital to pharmaceutical research through the NVIDIA BioNeMo™ platform, accelerating time to insight in biomolecular science and drug discovery. German and other European researchers can apply for access to JUPITER. About NVIDIA NVIDIA (NASDAQ: NVDA) is the world leader in accelerated computing. For further information, contact: Alex Shapiro NVIDIA Public Relations 1-415-608-5044 ashapiro@ Certain statements in this press release including, but not limited to, statements as to: AI supercharging scientific discovery and industrial innovation; in partnership with Jülich and Eviden, NVIDIA building Europe's most advanced AI supercomputer to enable the leading researchers, industries and institutions to expand human knowledge, accelerate breakthroughs and drive national advancement; the benefits, impact, performance, and availability of NVIDIA's products, services, and technologies; expectations with respect to NVIDIA's third party arrangements, including with its collaborators and partners; expectations with respect to technology developments; and other statements that are not historical facts are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are subject to the 'safe harbor' created by those sections based on management's beliefs and assumptions and on information currently available to management and are subject to risks and uncertainties that could cause results to be materially different than expectations. Important factors that could cause actual results to differ materially include: global economic and political conditions; NVIDIA's reliance on third parties to manufacture, assemble, package and test NVIDIA's products; the impact of technological development and competition; development of new products and technologies or enhancements to NVIDIA's existing product and technologies; market acceptance of NVIDIA's products or NVIDIA's partners' products; design, manufacturing or software defects; changes in consumer preferences or demands; changes in industry standards and interfaces; unexpected loss of performance of NVIDIA's products or technologies when integrated into systems; and changes in applicable laws and regulations, as well as other factors detailed from time to time in the most recent reports NVIDIA files with the Securities and Exchange Commission, or SEC, including, but not limited to, its annual report on Form 10-K and quarterly reports on Form 10-Q. Copies of reports filed with the SEC are posted on the company's website and are available from NVIDIA without charge. These forward-looking statements are not guarantees of future performance and speak only as of the date hereof, and, except as required by law, NVIDIA disclaims any obligation to update these forward-looking statements to reflect future events or circumstances. © 2025 NVIDIA Corporation. All rights reserved. NVIDIA, the NVIDIA logo, CUDA-Q, CUDA-X, BioNeMo, NVIDIA Grace Hopper, NVIDIA Omniverse and PhysicsNeMo are trademarks and/or registered trademarks of NVIDIA Corporation in the U.S. and other countries. Other company and product names may be trademarks of the respective companies with which they are associated. Features, pricing, availability and specifications are subject to change without notice. A photo accompanying this announcement is available at