The Dark Energy Spectroscopic Instrument (DESI) has produced the largest three-dimensional map of the universe ever constructed, charting the positions and distances of millions of galaxies across cosmic time. The milestone represents a step-change in observational cosmology, giving researchers an unprecedentedly detailed picture of large-scale structure across billions of light-years. Early data from the survey are already generating significant scientific debate. Preliminary results suggest dark energy, the force thought to drive the universe's accelerating expansion, may not be the fixed cosmological constant that has underpinned the standard model of cosmology for decades. If dark energy evolves over time rather than remaining static, the Lambda-CDM framework, which has guided theoretical physics and cosmological research since the late 1990s, would require fundamental revision. That revision would carry downstream consequences for models of the universe's ultimate fate, the interpretation of cosmic microwave background data, and how physicists approach grand unified theories. Confirmation will require additional DESI data releases and cross-validation with complementary surveys.
Elon Musk has crossed one trillion dollars in net worth, becoming the world's first trillionaire after SpaceX's stock market debut crystallised the value of his stake in the company. The listing is also a major market event, opening one of the last large private tech companies to public investors.
Donald Trump Jr. secretly acquired a stake in America First Refining, a struggling Texas oil refinery startup, before India's Reliance Industries made a nine-figure investment in the company. The deal came as the Trump administration was pressuring Reliance over Russian oil purchases, and was followed by major U.S.
India's AAIB will publish an interim factual report next month on the Air India crash that killed 260 people in Ahmedabad in June 2025. Preliminary findings suggest fuel control switches moved to 'cut off' after take-off, causing engine power loss. A final report awaits further consultations.
The White House was locked down after dozens of apparent gunshots were heard nearby, with the Secret Service and FBI responding to the scene. Journalists inside the building were moved to the press briefing room while authorities assessed the threat.